English words: once and again to one-form

300 English words, part 23 of 67 of the words starting with O, A to Z. 12 have a page of their own.

English words once and again to one-form

once and again adverb: More than once; repeatedly.
once and for all adverb: Conclusively, finally, permanently.
once bitten, twice shy proverb: One is cautious if one has been hurt in the past.
once burned, twice cautious proverb: Alternative form of once bitten, twice shy.
once burned, twice shy proverb: Alternative form of once bitten, twice shy.
once for all adverb: Dated form of once and for all.
once hurt, twice shy proverb: Alternative form of once bitten, twice shy.
once in a blue moon adverb /wʌns ɪn ə bluː muːn/: Very rarely; very infrequently.
once-in-a-generation adjective: Very rare; likely to happen only once in a given generation.
once-in-a-lifetime adjective: Likely to happen only once in one's lifetime; extremely rare.
once in a purple moon adverb: Synonym of once in a blue moon (“rarely”).
once in a way adverb: Once in a while; occasionally; every now and then.
once in a while adverb: Occasionally; sometimes.
once more adverb: Again, a further time, once again.
once more into the breach phrase: Let's get back to work.
once-off adjective, noun: Alternative form of one-off.
once on a time adverb: once upon a time
once on shore, we pray no more proverb: Synonym of danger past, God forgotten
once or twice phrase: A small, indefinite number of times.
once over noun: A quick clean or polish.
once-over-lightly noun: Synonym of once-over (“a quick inspection, survey, etc.”).
once removed adjective: One generation apart.
once upon a time adverb /ˈwʌns.əˈpɑn.əˈtaɪ̯m/: A long time ago; at some time in the past (a traditional beginning of children's stories, especially fairy tales).
once you go black phrase: Once a person of another race has a sexual relationship with a black person, implying that they will not return to having sexual relationships with members...
once you go black, you never go back proverb: Once someone has had sexual intercourse with a black person they will not want to return to having sexual intercourse with nonblack people.
once you go Persian, there's no other version proverb: Once someone has had sexual intercourse with a Persian person they will not want to return to having sexual intercourse with people of other ethnicities.
onced adverb: Alternative form of oncet (“once”).
onceness noun: The state or condition of being once; singularity.
oncer noun /ˈwʌnsɚ/: A one-pound note.
oncet adverb /ˈwʌn(t)st/: Once.
onch noun /ˈɒŋk/: Alternative form of ankh.
onchidiid noun: Any slug in the family Onchidiidae.
onchobothriid noun: Any tapeworm of the family Onchobothriidae
onchocercal adjective: Relating to worms of the genus Onchocerca or to the disease onchocerciasis
onchocerchiasis noun: Alternative form of onchocerciasis.
onchocerciasis noun /ɒŋkəsɜːˈkaɪəsɪs/: A disease caused by a worm of the genus Onchocerca, especially as transmitted to humans by flies and often causing blindness; common in tropical Africa.
onchocercid noun: Any nematode in the family Onchocercidae.
onchocercoma noun: A nodule containing Onchocerca in river blindness (onchocerciasis).
onchocercosis noun: Synonym of onchocerciasis.
onchocercotic adjective: Of or pertaining to onchocercosis.
onchodermatitis noun: A form of dermatitis caused by filarial worms of the genus Onchocerca
onchom noun: Alternative form of oncom.
onchosphere noun: Alternative form of oncosphere.
oncidium noun: Any of the genus Oncidium of tropical orchidaceous plants.
oncilla noun /ɒnˈsiː.ə/: A small spotted felid, of species Leopardus tigrinus, found in the tropical rainforests of Central America and South America.
onco- prefix: Pertaining to tumors.
oncoapoptosis noun: The apoptosis of cancer cells, especially when induced therapeutically
oncoapoptotic adjective: Relating to oncoapoptosis.
oncobiology noun: The biology of cancer
oncocalyxone noun: Any of a group of analgesic anthraquinones present in Auxemma oncocalyx
oncoceratid noun: Any extinct nautiloid cephalopod in the family Oncoceratidae.
oncocyte noun: A large, granular cell, having many mitochondria, found in salivary and certain endocrine glands.
oncocytic adjective: Of or pertaining to an oncocyte or to oncocytoma
oncocytoma noun: A benign tumour composed of oncocytes.
oncodermatology noun: The study and the treatment of skin disorders that are the result of cancer
oncodevelopmental adjective: Relating to the development of a cancer
oncodiabetology noun: The study of the relationship between cancer and diabetes
oncodomain noun: A protein domain responsible for a cancer
oncodriver noun: Any substance that "drives" cancer cells towards apoptosis
oncofactor noun: Any factor that affects the growth of a cancer
oncofertility noun: Fertility despite cancer.
oncofetal adjective: Typically present only during fetal development, but also found in adults with certain cancers.
oncofoetal adjective: Alternative form of oncofetal.
oncogen noun: Any agent that causes tumors.
oncogene noun /ˈɒŋkə(ʊ)dʒiːn/: Any gene that contributes to the conversion of a normal cell into a cancerous cell when mutated or expressed at high levels.
oncogenesis noun: The formation and development of tumors.
oncogenetic adjective: Relating to oncogenetics.
oncogenetically adverb: By means of oncogenetics
oncogeneticist noun: A geneticist whose speciality is oncogenetics
oncogenetics noun: The study of the genetic origin of cancers
oncogenic adjective /ˌɒŋkoʊˈd͡ʒɛnɪk/: Causing the formation of tumors.
oncogenical adjective: Alternative form of oncogenic.
oncogenically adverb: In an oncogenic manner
oncogenicity noun: The state or degree of being oncogenic.
oncogenics noun: The study of the formation of tumours.
oncogenome noun: A genome of oncogenes.
oncogenomic adjective: Relating to oncogenomics or to an oncogenome.
oncogenomics noun: The study of the relationship between the genome of an individual and cancer
oncogenotype noun: Any genotype associated with cancer
oncogenous adjective /ɒŋˈkɒd͡ʒɪnəs/: Arising from or caused by a tumor.
oncogeny noun: Synonym of oncogenesis.
oncogeriatric adjective: Relating to cancer in elderly patients
oncogeriatrics noun: The branch of geriatrics dealing with cancer in elderly patients
oncograph noun: An instrument for registering the changes observable with an oncometer.
oncohaematologic adjective: Alternative form of oncohematological.
oncohaematological adjective: Alternative form of oncohematological.
oncohaematology noun: Alternative form of oncohematology.
oncohematologic adjective: Alternative form of oncohematological.
oncohematological adjective: Relating to blood cancer
oncohematology noun: The hematology of blood cancers
oncohistone noun: A mutated oncogenic histone
oncoid noun: A layered structure formed by cyanobacterial growth and making up part of an oncolite.
oncoimmunology noun: The immunology of cancer
oncoimmunotherapy noun: The use of immunotherapy to treat cancers
oncoinflammation noun: inflammation associated with a cancer
oncoinflammatory adjective: Relating to, or causing oncoinflammation
oncokinase noun: A form of onconase
oncolipid noun: Any lipid that is associated with a cancer
oncolite noun: a spherical sedimentary structure formed by cyanobacteria
oncolith noun: Synonym of oncolite.
oncolitic adjective: Containing oncoids or pertaining to oncolite.
oncologic adjective /ˌɒŋkəˈlɒd͡ʒɪk/: Of or pertaining to oncology
oncological adjective /ˌɒŋkəˈlɒd͡ʒɪkəɫ/: Of or pertaining to oncology.
oncologically adverb: With regard to oncology.
oncologist noun /ɒŋˈkɒləd͡ʒɪst/: A doctor or scientist who specializes in oncology.
oncology noun /ɒŋˈkɒləd͡ʒi/: The branch of medicine concerned with tumors, including study of their development, diagnosis, treatment, and prevention.
oncolysate noun: Any material that causes oncolysis
oncolysis noun: The breakdown or destruction of a tumour.
oncolytic adjective, noun: That breaks up cancer cells.
oncom noun /ɒnˈt͡ʃɒm/: A traditional staple food of West Javan (Sundanese) cuisine in Indonesia, similar to tempeh, and usually made from the by-products from the production of...
oncomarker noun: A biomarker that indicates the presence of cancer
oncome noun, verb: To arrive; come to; come on.
oncomer noun: An oncoming vehicle.
oncometabolic adjective: Relating to oncometabolism or to oncometabolites
oncometabolite noun: Any metabolite that is associated with a cancer
oncometer noun: An instrument for measuring the variations in size of the internal organs (usually the kidney) of the body. The organ was placed inside, and subjected to...
oncometric adjective: Relating to oncometry.
oncoming adjective, noun, verb: Approach, onset
oncomir noun: A form of microRNA involved in a cancer.
oncomiracidial adjective: Relating to the oncomiracidia
oncomiracidium noun: The free-swimming, ciliated larval form of a monogenean.
oncomodulation noun: The modification of the course of a cancer.
oncomodulator noun: Any material that modifies the progress of a cancer
oncomodulatory adjective: That modifies the progress of a cancer
oncomodulin noun: A calcium-binding parvalbumin found in macrophages
oncomouse noun: A type of laboratory mouse that has been genetically modified to carry an activated oncogene, increasing its susceptibility to cancer.
oncomutation noun: A mutation associated with a cancer
onconase noun: An antitumor ribonuclease proposed for use in chemotherapy
onconeural adjective: Relating to cancer and to the neural system.
onconeuronal adjective: Related to cancer and to neurological syndromes
oncopathogen noun: Any oncogenic pathogen
oncopathology noun: The pathology of cancer
oncopeptide noun: A peptide that is associated with a particular cancer
oncopharmacology noun: The pharmacology of cancer
oncophysics noun: The physics of cancer
oncoplastic adjective: Describing plastic surgery that mitigates the physical effects of cancer
oncoplot noun: A diagrammatic representation of genetic mutations
oncopodid noun: Any harvestman/daddy longlegs in the family Oncopodidae, a synonym of the Sandokanidae.
oncopromoting adjective: That promotes cancer
oncoprotective adjective: That protects against cancer
oncoprotein noun: A protein that is coded for by an oncogene.
oncoproteogenome noun: A proteogenome of oncogenes.
oncoproteogenomic adjective: Relating to oncoproteogenomes.
oncoproteogenomics noun: The genomics of oncoproteogenomes.
oncoproteome noun: A proteome of oncoproteins.
oncoproteomic adjective: Relating to oncoproteomes or to oncoproteomics.
oncoproteomics noun: The proteomics of oncoproteomes.
oncoregulator noun: Any material, typically a protein, that regulates the onset and development of a cancer
oncoretroviral adjective: Of, pertaining to, or caused by an oncoretrovirus.
oncoretrovirus noun: A retrovirus associated with a cancer
oncoribosome noun: A specialised ribosome associated with a cancer
oncornaviral adjective: Relating to oncornaviruses.
oncornavirus noun: Any of a group of RNA viruses, of the subfamily Oncornvirinae in the family Retroviridae, that cause tumors in various animals and in humans.
oncosimeter noun: A device for measuring the specific gravity of a molten metal by recording on a band of paper the sinking or floating effect of a ball of the solid metal...
oncosis noun: ischemic cell death: a process characterized by mitochondrial swelling, cytoplasm vacuolization, and swelling of the nucleus and cytoplasm
oncosome noun: A membrane-derived microvesicle that is secreted by cancer cells and transfers oncogenic messages and protein complexes across cell borders
oncospheral adjective: Relating to an oncosphere
oncosphere noun: An embryonic form of a tapeworm, enclosed in a spherical membrane armed with six hooks
oncost noun: Additional costs; extra expenses.
oncostain noun: A substance that stains cancerous tissue (in microscopic examination)
oncostatic adjective: That halts the spread of a cancer
oncostatin noun: Any of a group of pleitropic cytokines.
oncostman noun: Any workman who was paid a daily rate.
oncosuppression noun: The suppression of the formation and development of tumours
oncosuppressive adjective: That suppresses the formation and development of tumours
oncosuppressor noun: An oncosuppressive gene
oncosurgical adjective: Relating to cancer surgery.
oncotarget noun: The target of a cancer therapy
oncotherapeutic adjective: Relating to oncotherapy
oncotherapy noun: The treatment of tumours (especially cancerous ones)
oncotic adjective: Relating to osmotic pressure caused by the presence of colloids.
oncotomy noun: The opening of an abscess, or the removal of a tumour, with a cutting instrument.
oncotripsy noun: The selective targeting of cancer tissue.
oncotropic adjective: That has an affinity for tumours
oncotropism noun: The condition of being oncotropic
oncotype noun: Any specific type of cancer, characterised by a specific test
oncovaccine noun: A vaccine for a cancer.
oncovin noun: vincristine
oncoviral adjective: Relating to an oncovirus
oncovirus noun /ˈɒŋkəʊvʌɪɹəs/: A virus that can cause cancer.
onct adverb: Alternative form of oncet.
oncula noun: A red stone-based dye used as hair product by the Mwila tribe.
-oncus suffix: Used to form names of conditions involving a tumor, swelling, or mass.
Ondaatje proper noun: A surname.
ondansetron noun /ɒnˈdæn.sə.tɹɒn/: A carbazole derivative (trademark Zofran), C₁₈H₁₉N₃O, that is a serotonin receptor antagonist administered by injection and by mouth to relieve nausea and...
ondatra noun: The muskrat.
onde adjective, noun, verb: envy; hatred; malice
ondes martenot noun: An early electric keyboard instrument.
ondine noun: Alternative form of undine (“water-sprite”).
onding noun: Breathing; smelling.
ondiola noun: An electronic musical instrument, an Italian version of the clavioline.
ondioline noun: An early type of synthesizer
ondist noun: A person who played a ondes martenot
Ondo adjective, noun: People of Ondo City, Ondo State, and/or Ondo Kingdom, collectively.
ondogram noun /ˈɒndəˌɡræm/: The recording produced by an ondograph.
ondograph noun /ˈɒndəʊˌɡrɑːf/: An instrument for autographically recording the waveforms of varying currents, especially rapidly varying alternating currents.
ondol noun: A Korean form of underfloor heating that uses direct heat transfer from wood smoke to the underside of a thick masonry floor.
ondometer noun: An instrument designed to measure wavelengths.
ondoscope noun: An instrument that detects (and visualizes) the presence of high-frequency radiation
ondoyant adjective: wavy; having the surface marked by waves or slightly depressed furrows
ondy adjective: Alternative form of undé.
one adjective, determiner, noun, number, particle, pronoun, suffix, verb /wʌn/: The number represented by the Arabic numeral 1; the numerical value equal to that cardinal number.
one-act noun: A one-acter
one-acter noun: A play of one act
one after another adverb: In single file.
one after the other adverb: Alternative form of one after another.
one age with phrase: The same age as.
one-ahead adjective: A form of billet reading in which the supposedly clairvoyant performer is covertly given information about one of the concealed messages beforehand, and...
one and a half noun: One and a half parts of anything that may be divided, or considered as divided.
one-and-a-half-spaced adjective: Formatted so that there is one half of a blank line between each line of text.
one and a half syndrome noun: A rare weakness in eye movement affecting both eyes, where one eye cannot move laterally at all, and the other can move only in outward direction.
one and all pronoun: The entire set of persons or things within a given domain, considered both as separate individuals and collectively.
one and done noun: Something that is completed or accomplished only once, never to be done again.
one and nines noun: Cheap seats in a theatre, costing one shilling and nine pence.
one and one noun: A serving of fish and chips.
one and only adjective, noun: Unique, one of a kind.
one and out noun: a type of elimination playoff series that is a single-game series, to decide who wins the playoff round
one and the same determiner, pronoun: The selfsame. Used to emphasize the identity or equivalence of two things.
one-and-twenty number: Synonym of twenty-one.
one another pronoun: Used of a reciprocal relationship among a group of two or more people or things; compare each other.
one another's pronoun: The possessive form of one another.
one-arm bandit noun: Alternative form of one-armed bandit.
one-arm joint noun: Synonym of one-arm lunchroom.
one-arm lunchroom noun: A diner serving snacks and simple meals.
one-arm restaurant noun: Synonym of one-arm lunchroom.
one-armed adjective /ˌwʌnɑːmd/: Having only one arm; especially having lost an arm.
one-armed bandit noun /ˌwʌnɑːmd ˈbændɪt/: A gaming machine having a long arm-like handle at one side that a player pulls down to make reels spin; the player wins money or tokens when certain...
one-armed router noun: A special variety of router used to route packets in a VLAN environment.
one at a time adverb: During sequentially discrete instances.
one bad apple can spoil the barrel proverb: One bad person or element can have a harmful influence on many others.
one bad apple can spoil the whole bunch proverb: Synonym of one bad apple can spoil the barrel.
one bad turn deserves another proverb: One act of malice should be paid back by another act of malice.
one-bagger noun: A single (a one-base hit).
one-banana problem noun: A problem that should be easily resolved.
one-bar prison noun: A bondage contraption consisting of a vertical shaft with a dildo on top, which a submissive is intended to sit upon.
one big happy family noun: A group of people who get along well together.
one-blink town noun: Synonym of one-horse town
one brick short of a full load adjective: Not mentally sound; insane.
one by one adverb: Individually in succession.
one-camel town noun: A very small town in the desert, especially one of a rural nature and/or offering very few or no attractions.
one can dish it, but one can't take it phrase: Alternative form of one can dish it out, but one can't take it
one can dish it out, but one can't take it phrase: One is able to express thoughts, criticism, or insults towards others, but cannot accept being on the receiving end of the same treatment.
one can run but one can't hide proverb: There is nothing someone can do to evade something.
one can't break a stick in a bundle proverb: Alternative form of sticks in a bundle are unbreakable.
one can't break a twig in a bundle proverb: Alternative form of sticks in a bundle are unbreakable.
one can't break sticks in a bundle proverb: Alternative form of sticks in a bundle are unbreakable.
one can't carry two watermelons under one arm proverb: Alternative form of one can't hold two watermelons in one hand.
one can't hold two watermelons in one hand proverb: One should not attempt to take on more than one can handle.
one can't live with them, one can't live without them proverb: Alternative form of can't live with them, can't live without them.
one cannot break a stick in a bundle proverb: Alternative form of sticks in a bundle are unbreakable.
one cannot break a twig in a bundle proverb: Alternative form of sticks in a bundle are unbreakable.
one card short of a full deck adjective: Synonym of a few cards shy of a full deck.
one card shy of a full deck adjective: Synonym of a few cards shy of a full deck.
one-celled adjective: Single-celled, unicellular.
one-child policy noun: A policy of population control in China, whereby a married couple is allowed only one child.
one-cold noun: A set of bits with only a single low (0) bit, with the remaining bits high (1).
one could do it in one's sleep phrase: Said of something that can be done very easily or effortlessly.
one could hear a pin drop phrase: Extremely quiet, for example, as during a lull in a normally bustling place or scene, or at a sudden dramatic or tense moment.
one country, two systems phrase: The mainland Chinese policy for the reunification of China as one country, with areas like Hong Kong, Macau and (unilaterally and prospectively) Taiwan with...
one'd contraction /wʌnd/: One would.
one day adjective, adverb: At some unspecified time in the future.
one-day cricket noun: A form of cricket, played on one day, in which each side bats only once. Each side's innings finishes when either their allotted number of overs has been...
one-day international noun: A one-day match played between teams representing the Test nations.
one-day match noun: a game of cricket played on one day; each side batting once
one-dayer noun: Any event lasting one day.
one-dimensional adjective: Having length, but no width, height or depth.
one-dimensionally adverb: In a one-dimensional way or manner.
One Directioner noun: A member of the English-Irish pop boy band One Direction.
one-dog night noun: A particularly cold, chilly night.
one-dollar contract noun: A legally binding agreement in which one party agrees to provide goods, services, or property to another for the nominal price of exactly one dollar; it is...
one-dollar man noun: Synonym of dollar-a-year man.
one-downmanship noun: A social tactic where someone tries to gain the upper hand in a conversation by emphasizing their own inferiority, hardships, or victimhood compares to...
one drop noun: A style of drumming, prevalent in reggae and attributed to Winston Grennan, in which the snare and bass play on the same beat.
one-drop rule noun: The notion that one drop of black blood (i.e., any African ancestry at all) makes a person black.
one eighth noun: rare spelling of one-eighth
one-eighty noun: Alternative form of 180.
one eighty out adjective: incorrect; false
one engine in steam phrase: A principle in railway signalling where only one train or locomotive is allowed to run on a section of single-track line, such as a branch line, at any one...
one-er noun: Alternative form of oner.
one-eyed adjective /ˈwʌnˌaɪd/: Having only a single eye, particularly when a greater number is normal.
one eyed jack noun: Alternative form of one-eyed jack.
one-eyed king noun: The king of diamonds in a deck of playing cards.
one-eyed monster noun: Television, especially seen as an addiction.
one fat lady noun: eight
one fell swoop noun: One stroke; one action or event that achieves or accomplishes many results.
one fifth noun, number: rare spelling of one-fifth
one finger salute noun, verb: The obscene gesture made by holding only the middle finger of a hand erect while the rest of the fingers are in a fist.
one fingered salute noun: Alternative form of one-finger salute.
one flesh noun: Two people united by marriage.
one-flowered wintergreen noun: The plant Moneses uniflora.
one foot noun: A trick with one foot free from the bindings; instead it is placed beside the rear binding and boned far away from the board during airtime.
one foot in the grave noun: Indicates being near death, or almost dead.
one foot out the door noun: Indicates being on the verge of or in the process of (and sometimes eagerness for) leaving (a place, a relationship, life, etc).
one-footed adjective: Having one foot.
one for all, all for one phrase /wʌn fəɹɔːl ɔːl fə wʌn/: Each individual should act for the benefit of the group, and the group should act for the benefit of each individual.
one for luck noun: An extra repetition of an action beyond what is needed.
one-for-one adjective: Synonym of one-to-one.
one for the money, two for the show, three to make ready, and four to go phrase: A countdown prior to exerting some effort, such as launching a burden or running a race.
one for the road noun: A final drink before one leaves.
one-form noun: a covector field

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0): each word's first meaning. A word with a page of its own links to it; for the rest, this line is PlainSpell's entry. Total under O: 20,049 words, in 67 parts.