English words: Oola to open bar

300 English words, part 27 of 67 of the words starting with O, A to Z. 31 have a page of their own.

English words Oola to open bar

Oola proper noun: A village in County Limerick, Ireland.
oolachan noun: Alternative form of eulachon.
oolachen noun: Alternative form of eulachon.
oolacunta noun: An extinct marsupial, the desert rat kangaroo (Caloprymnus campestris), that lived in a sand-ridge and gibber-plain habitat in south-western Queensland and...
oolak noun: An Indian boat for transporting freight.
oolakan noun: Alternative form of eulachon.
oolemma noun: The cell membrane of an oocyte.
oolican noun: Alternative form of eulachon.
oolichan noun: Alternative form of eulachon.
'ooligan adjective: Pronunciation spelling of hooligan.
oolite noun /ˈəʊəlʌɪt/: A rock consisting of spherical grains within a mineral cortex accreted around a nucleus, often of quartz grains.
oolith noun /ˈəʊəlɪθ/: A spherical granule of which oolite is composed, formed by concentric accretion of thin layers of a mineral (usually calcium carbonate (limestone) but also...
oolithic adjective: Relating to ooliths.
oolitic adjective, noun: Made up of, or containing oolites
oolitiferous adjective: Bearing oolite.
oolock noun: Alternative form of oolak.
oologic adjective: Of or relating to oology.
oological adjective: Of or relating to oology.
oologically adverb: From the perspective of scientific study of eggs or of a collector of eggs.
oologist noun: A person who studies or specializes in oology.
oologize verb: To go hunting for eggs.
oology noun /əʊ̯ˈ(w)ɒləd͡ʒi/: Alternative spelling of oology.
oolong noun /ˈuː.lʊŋ/: A partially fermented tea, often roasted, which combines the characteristics of green tea and black tea.
oolong tea noun /ˈuː.lʊŋ tʰi/: A type of tea with a taste in between green tea and black tea.
OOLR noun: Abbreviation of overall objective loudness rating.
oom noun, phrase /ʊəm/: An older man, especially an uncle. (Frequently as a respectful form of address.)
oom-pa-pa noun: Alternative spelling of oom-pah-pah.
oom-pah noun: A genre of Germanic music (especially Bavarian music) typically involving brass instruments.
oom-pah-like adjective: Alternative spelling of oompah-like.
oom-pah-pah noun: A variant of oom-pah played in triple time.
Ooma proper noun: Alternative form of Umwa, Banaba, Kiribati (possibly older spelling).
'ooman noun: Woman.
oomancy noun: Divination through the use of eggs.
oomantia noun: Alternative form of oomancy.
-oomer suffix /uːmə(ɹ)/: Used to form the names of Wojak characters, or, by extension, caricaturized personifications of a given trait/quality.
oometer noun: A device for the measurement of eggs.
oometry noun: The measurement of eggs.
oomf noun /uːmf/: Acronym of one of my followers or one of my friends.
oomfchella noun: A gathering of friends, especially online friends meeting offline.
oomfie noun /ˈum.fi/: Alternative letter-case form of OOMFie.
oomiac noun: Alternative spelling of umiak.
oomiack noun: Alternative spelling of umiak.
oomiak noun: Alternative spelling of umiak.
Oommen proper noun: A surname from Malayalam.
Oompa Loompa noun /ˈuːmpə ˈluːmpə/: Any of the fictional pygmies who manufacture candy in Roald Dahl's Charlie and the Chocolate Factory.
oompah noun, verb: Alternative spelling of oom-pah.
oompah-like adjective: Displaying an oom-pah rhythm or reminiscent of oom-pah music.
oompahpah noun: Alternative spelling of oom-pah-pah.
oompapa noun: Alternative spelling of oom-pah-pah.
oompf noun: Alternative form of oomph.
oomph noun, verb /ʊmf/: Strength, power, passion or effectiveness; clout.
oomphless adjective: Lacking oomph (vitality or sex appeal).
oomphy adjective: Full of oomph (strength, power, passion or effectiveness).
oomska noun: Filth, dirt.
oomycete noun: Any of a number of filamentous unicellular protists of the class Oomycetes; the water molds.
oomyceteous adjective: Alternative form of oomycetous.
oomyceticidal adjective: That kills oomycetes
oomycetous adjective: Relating to, or characteristic of oomycetes
oomycide noun: Any substance that kills oomycetes.
oomycote noun: Any of a group of filamentous protists variously classified as the phylum Oomycota or the class Oomycetes in a more broadly circumscribed phylum.
oon noun, suffix /uːn/: An oven.
Oona proper noun: A female given name from Irish.
Oonagh proper noun: A female given name from Irish.
oonopid noun: Any spider in the family Oonopidae.
oons interjection, noun: Expressing anger, surprise etc.
oont noun /ʊnt/: A camel.
oontz interjection, noun: The game of craps.
oontzy adjective: Characteristic of oontz music, with prominent electronic drum sounds.
oonucleus noun: The nucleus of an oosphere.
oonuh pronoun: You (plural); y'all, you guys, you all.
ooo adjective, noun, phrase: hugs (usually placed at the end of a letter or in text messaging, sometimes alongside xxx meaning kisses)
oooh interjection, noun, verb: Elongated form of ooh.
ooooh interjection: Elongated form of ooh.
OOOP noun: Initialism of original original original poster (“the original poster of material that has been quoted or linked to within a post that has also been quoted...
oop adjective, adverb, interjection, noun, verb /ʊp/: Initialism of object-oriented programming.
oopa noun: Alternative form of OOPA.
Oopack noun: A kind of black tea.
Oopak noun: Alternative spelling of Oopack.
oopart noun: An object found in a very unusual or apparently impossible archaeological context (like the Coso sparkplug found in an allegedly 500,000-year-old geode)...
ooph interjection: Alternative form of oof.
oophagic adjective: Synonym of oophagous.
oophagous adjective: Relating to or exhibiting oophagy.
oophagy noun /əʊˈɒfədʒi/: The eating of eggs; (now especially) the cannibalization of subordinate eggs within a homogeneous population or the uterus; particularly as it relates to...
oopherectomy noun: Oophorectomy.
oophor- prefix /oʊˈɒfəɹ-/: Alternative form of oophoro- (before a vowel)
oophore noun: Alternative spelling of oophore.
oophorectomise verb: Alternative form of oophorectomize.
oophorectomize verb: To perform, or to undergo an oophorectomy
oophorectomy noun /oʊˌɒfəˈɹɛktəmi/: The surgical removal of one or both ovaries, usually performed to treat or prevent conditions such as ovarian cancer, ovarian cysts, endometriosis, or other...
oophoric adjective: Having the nature of, or belonging to, an oophore.
oophoridium noun: The macrosporangium or case for the larger kind of spore in heterosporous flowerless plants.
oophoritis noun /oʊˌɒfəˈɹaɪtɪs/: inflammation of the ovaries.
oophoro- prefix /oʊˈɒfəɹoʊ-/: Ovary; ovarian.
oophorocystectomy noun /oʊˈɒfəɹoʊˌsɪstˈɛktəmi/: Excision of an ovarian cyst.
oophorohysterectomy noun: The surgical removal of the ovaries and uterus, commonly performed to treat reproductive diseases or for sterilization in female animals.
oophoroma noun /oʊˌɒfəˈɹoʊmə/: A tumor of the ovary.
oophoron noun /oʊˈɒfəɹɒn/: Synonym of ovary.
oophoropexy noun /oʊˈɒfəɹoʊˌpɛksi/: Surgical fixation of a displaced ovary by suturing to the abdominal wall.
oophorosalpingectomy noun /oʊˈɒfəɹoʊˌsælpɪnˈd͡ʒɛktəmi/: Alternative form of salpingo-oophorectomy.
oophorotomy noun /oʊˌɒfəˈɹɒtəmi/: An incision into an ovary.
oophorous adjective /oʊˈɒfəɹəs/: Containing eggs or ova.
oophyte noun: gametophyte
oophytic adjective: of, pertaining to or characteristic of an oophyte
OOPL noun: Initialism of object-oriented programming language.
oopla noun: Dried cow dung formed into cakes for use as fuel.
ooplah noun: Alternative form of oopla.
ooplasm noun: The cytoplasm of an egg or ovum
ooplasmatic adjective: Alternative form of ooplasmic.
ooplasmic adjective: Concerning the cytoplasm of eggs
ooplast noun: Synonym of oosphere.
oops interjection, noun, verb /uːps/: Used to acknowledge a small mistake or accident.
oops baby noun: A child born as the result of an unplanned pregnancy.
oopsadaisy interjection: Synonym of whoops-a-daisy.
oopsie interjection, noun, verb: Alternative spelling of oopsy.
oopsie-daisy interjection: Alternative form of whoops-a-daisy.
oopsies noun, verb: Oops.
oopsortunity noun: An accident or mistake that shows itself to be an opportunity.
oopsy interjection, noun, verb /ˈuːpsi/: Synonym of oops.
oopsy-daisy interjection: Alternative form of whoops-a-daisy.
oopsy-doopsy interjection: Alternative form of oopsy.
oopuhue noun /oʊʔoʊpəˈhuːiː/: globefish
oor kid noun: Younger (sometimes older) sibling, usually masculine.
oorah interjection /ˈu.ɹɑː/: The official yell for the US Marines.
oorali noun: Alternative form of wourali.
oorari noun: curare
oorhodein noun: A reddish-brown pigment found in eggshells.
oorial noun: Alternative form of urial.
oorie adjective: Alternative form of ourie.
Ooriya noun: Dated form of Oriya.
Oorlam noun: Any member of a subtribe of the Nama people, originally formed from mixed-race descendants of indigenous Khoikhoi, Europeans and slaves from Madagascar,...
ooroo interjection /ˈuːɹuː/: Alternative form of hooroo
Oort proper noun: A surname from Dutch.
Oort cloud noun: A roughly spherical region of space composed of comet-like bodies and other minor planets and asteroids that orbit distantly in a planetary system.
Oorya noun: Dated form of Oriya.
oos adjective, noun: Initialism of object-oriented scanning.
OOSA noun: Initialism of object-oriented structured analysis.
oose noun /uːs/: Acronym of object-oriented software engineering.
ooser noun: A wooden horned mask used for folkloric and magical purposes. Possibly also the unknown creature upon which the mask was based.
OOSH noun /ʊʃ/: Acronym of out of school hours care.
ooshy-gooshy adjective: cloyingly sentimental
oosik noun /ˈuː.sɪk/: The baculum (penile bone) of a walrus, often sold as a souvenir to tourists in Alaska.
oosome noun: A mass of protoplasm at one end of an insect egg
oosorption noun: The resorption of a developing egg typically as a response to a parasite
oosparite noun: A kind of limestone consisting of ooids cemented together with sparite.
oosparitic adjective: Of, pertaining to, or containing oosparite.
oospecies noun: An ootaxon, equivalent to a species, used to classify fossilised dinosaur eggs
oosperm noun: The ovum, after fusion with the spermatozoon in impregnation.
oosphere noun /ˈəʊəsfɪə/: A large nonmotile egg cell, especially of an alga or fungus, formed in an oogonium and ready for fertilization.
oosporange noun: Synonym of oosporangium.
oosporangium noun: An oogonium.
oospore noun: A fertilized female zygote, having thick chitinous walls, that develops from a fertilized oosphere in some algae and fungi
oosporein noun: A dibenzoquinone that is a toxic metabolite of the fungus Cochliobolus kusanoi
oosporic adjective: Relating to the oospore.
oosporiferous adjective: Bearing oospores.
oosporogenesis noun: The sporogenesis of oospores
Oost proper noun: A river in Germany.
oostasis noun: The failure of (typically insect) eggs to form or to develop
oostatic adjective: Relating to, or causing oostasis
oostegite noun /əʊˈɒstɪd͡ʒaɪt/: Alternative form of oostegite.
Oosterbeek proper noun: A village in Renkum municipality, Gelderland province, Netherlands.
oosterboschite noun: An orthorhombic black mineral containing copper, palladium, and selenium.
oot adverb, pronoun /uːt/: anything
Ootacamund proper noun: Synonym of Udhagamandalam.
ootaxon noun: Any taxonomic classification of egg fossils
ootaxonomic adjective: Relating to ootaxonomy
ootaxonomy noun: The taxonomy of eggs
OOTB prepositional phrase: Initialism of out of the box (of a product).
OOTD noun: Initialism of outfit of the day.
ootheca noun /əʊəˈθiːkə/: An egg case of any of the orthopteroid insects (such as cockroaches and mantids).
oothecal adjective: Relating to an ootheca.
ootid noun: The haploid cell, produced by meiotic division of a secondary oocyte, that is a nearly mature ovum.
ootidogenesis noun: The part of oogenesis leading to the formation of ootids
OOTL adjective: Initialism of out of the loop.
OOTO prepositional phrase: Initialism of out of the office.
OOTQ prepositional phrase: Initialism of out of the question.
OOTS noun: Initialism of once-only technical system (“the EU cross-domain data space for secure government-to-government data exchange”).
Ooty proper noun /ˈuːti/: Nickname for Udhagamandalam: a city in Tamil Nadu, India.
ootype noun /ˈəʊətaɪp/: The part of the oviduct of certain trematodes in which the ova are completed by being furnished with yolk, and, by secretion from the Mehlis glands, with a...
OOV noun, prepositional phrase /uːv/: An item in a television (especially news) broadcast consisting of pictures alone, to be played on screen while the presenter continues to talk out of vision...
OOW noun: Initialism of ordination of women.
Oowekeeno noun: Alternative form of Wuikinuxv.
oowop noun: An uzi submachine gun.
ooxanthine noun: Alternative form of ooxanthin.
ooyah interjection: ouch; oof
oozage noun: Seepage or leakage via oozing.
ooze noun, verb /uːz/: Tanning liquor, an aqueous extract of vegetable matter (tanbark, sumac, etc.) in a tanning vat used to tan leather.
ooze leather noun: Leather made from sheep and calf skins by mechanically forcing ooze through their pores; especially, such leather with a soft, finely granulated suede-like...
oozel noun: Alternative form of ouzel.
oozey adjective: Alternative form of oozy.
oozie noun: In Myanmar, an elephant trainer or mahout.
oozily adverb /ˈuːzɪli/: In an oozy manner.
oozin' verb: Pronunciation spelling of oozing.
ooziness noun: The state or condition of being oozy.
oozing noun, verb: Something that oozes; a seepage.
oozingly adverb: In an oozing manner.
oozle noun, verb: An effect created by dropping clear water onto a painted section before it is dry, forming a burst of color.
oozlum bird noun: A fictional bird said to fly backwards or in circles.
oozooid noun: A zooid that develops from an egg and reproduces by budding
oozy adjective /ˈuːzi/: Of or pertaining to the quality of something that oozes.
op adjective, noun, verb /ɒp/: Clipping of opponent; alternative spelling of opp.
op-amp noun: A certain active circuit element useful in creating various kinds of amplifiers and filters.
op art noun: A genre of abstract art that uses geometric shapes and vivid colours to create optical illusions, such as an illusion of movement.
opłatek noun: Alternative form of oplatek.
op-ed adjective, noun, verb /ˈɒpˌɛd/: A newspaper page containing signed articles by commentators expressing viewpoints that may not agree with those espoused by the editorial board,...
op shop noun: A shop, usually operated by a charity, to which new or used goods are donated, for sale at a low price.
opa noun: Grandfather, grandpa.
opabiniid noun: Any extinct arthropod in the family Opabiniidae.
OPAC noun: Acronym of online public access catalog.
opacarophilia noun: Love of the sunset; attraction (sometimes sexual) to sunsets.
opacate verb /ˈəʊpəkeɪt/: To darken; to cloud.
opacating adjective, verb: Making or becoming opaque.
opacifiable adjective: Capable of being made opaque.
opacification noun: The action of making something opaque or cloudy.
opacifier noun: a chemical agent added to a material, such as rocket propellant, to make it opaque
opacify verb: To make opaque.
opacimeter noun: Any instrument that measures opacity
opacious adjective: Opaque.
opacite noun: A small, dark grain, of doubtful origin, in an igneous rock
opacity noun /oʊˈpæsɪti/: The state or quality of being opaque, not allowing light to pass through.
opacous adjective: Not shining or illuminated; dark.
opacousness noun: Opacity.
opacular adjective: opaque
opah noun /ˈəʊpə/: Any of various large, colourful, deep-bodied pelagic fish of the family Lamprididae.
opakapaka noun: Pristipomoides filamentosus, the crimson jobfish.
opal noun /ˈəʊpəl/: A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity, of the chemical formula SiO₂·nH₂O.
opal aura noun: Synonym of angel aura.
opal glass noun: A type of opaque, translucent glass.
opal pineapple noun: A pineapple-shaped-cut opal gem as a part of jewelry
opal pseudomorph noun: Synonym of pineapple opal
opaled adjective: opalescent; misty or milky in appearance
opalesce verb /əʊpəˈlɛs/: To be opalescent; to produce or show a play of colors, like an opal.
opalescence noun /ˌəʉpəˈlesəns/: the state of being opalescent
opalescent adjective /oʊpəˈlɛsənt/: Exhibiting a milky iridescence like that of an opal.
opalescent nudibranch noun: A brightly-coloured nudibranch sea slug, Hermissenda crassicornis, with an orange stripe along its head area as well as white stripes on the cerata and...
opalescently adverb: In an opalescent manner.
opalesque adjective: Similar to opal; having some of the qualities of opal.
opaleye noun: A fish, Girella nigricans, a species of sea chub found in the Eastern Pacific.
opalfish noun: Hemerocoetes monopterygius, a ray-finned fish, found only around New Zealand.
opalic adjective: Having a structure similar to that of opal
opaline adjective, noun: Resembling opal in having a milky white iridescence.
opalinid noun: Any heterokont in the family Opalinidae.
opalisation noun: Alternative form of opalization.
opalise verb: Alternative spelling of opalize.
opalish adjective: Resembling or characteristic of opal.
opalite noun /ˈəʊ̯.pəl.aɪ̯t/: Opal; some variety of it; an artificial mineral resembling it.
opalization noun: The process of making something opalescent, or of converting wood etc into opal.
opalize verb: To convert into a form of opal or chalcedony, especially to convert wood into such a fossilized form.
opalized adjective, verb: Converted into a form of opal or chalcedony
opalled adjective: Alternative form of opaled.
opalotype noun: A photograph taken on opalescent glass.
opalware noun: A form of opaque toughened glass used for dinnerware.
-opamine suffix /ˈəʊ.pə.miːn/: Used to form names of dopaminergic agents and dopamine derivatives, used as cardiac stimulants, antihypertensives or diuretics.
opamp noun: Alternative form of op-amp.
opanak noun: A kind of traditional leather shoe worn in Bulgaria, Bosnia and Herzegovina, Croatia, Macedonia and Serbia.
opanka noun: A kind of sandal worn in Eastern Europe.
opaque adjective, noun, verb /əʊˈpeɪk/: Neither reflecting nor emitting light.
opaque box noun: Synonym of black box.
opaquely adverb: In an opaque manner.
opaquen verb /əʊˈpeɪkən/: To make or become opaque.
opaqueness noun: Synonym of opacity.
opaquer adjective, noun: A substance used to block out dark colours of staining, underlying dental work, etc.
opara noun: The oldest son, who has inherited the rights and responsibilities of his father after his father has died.
OPAT noun: Acronym of outpatient parenteral antimicrobial therapy.
Opata noun: An indigenous people of northern Sonora.
Opatija proper noun: A city in Croatia.
Opava proper noun: A city in the Czech Republic.
opb phrase: Abbreviation of operated by.
OPC noun: Abbreviation of oligomeric proanthocyanidin.
OPCA noun: Acronym of organized pseudolegal commercial argument (“a legal classification of widespread pseudolegal arguments and practices; pseudolaw”).
opcode noun: A mnemonic used to refer to a microprocessor instruction in assembly language.
OPCON noun: Alternative form of OPCON.
OPD noun: Initialism of offender personality disorder: applied to a pathway of services for treating criminal offenders with personality disorders.
opdalite noun: A charnockitic form of granodiorite
ope adjective, interjection, noun, suffix, verb /oʊp/: Eye
opegrapha noun /oʊˈpɛ.ɡɹə.fə/: Any lichen species of the genus Opegrapha.
opeh noun: betel palm; areca palm
opeidoscope noun: An instrument, consisting of a tube with one end open and the other end covered with a thin flexible membrane with a mirror attached to its centre, used for...
opelet noun: A bright-coloured European actinian (Anemonia sulcata), or the similar Anemonia viridis
Opelika proper noun: A city, the county seat of Lee County, Alabama, United States.
Opelka proper noun: A surname from Czech.
Opelousa noun: Alternative form of Appalousa.
Opelousas proper noun: A city, the parish seat of St. Landry Parish, Louisiana, United States.
open adjective, noun, verb /ˈəʊ.pən/: Able to have something pass through or along it.
open access noun: A set of principles and practices through which research outputs are distributed online, free of access charges or other barriers.
open admission noun: An unselective and noncompetitive college admissions process, where the only entrance criterion is a high-school diploma or a certificate of attendance or...
open adoption noun: An adoption in which the biological mother/biological parents and the adoptive family know each other's identities, and choose to remain in contact after...
open air adjective, noun: Located or taking place outdoors.
open air museum noun: A museum where the exhibitions are located outdoors.
open-aired adjective: Of, or pertaining to the outside or outdoors
open and affirming adjective: Of or pertaining to Christian congregations and other Christian groups that accept gay men and women, bisexuals, and transgender people.
open and notorious adjective: A requisite condition of adverse possession stipulating that the disseisor's occupation of the property must be visible and provide reasonable (if tacit)...
open and shut adjective: Simple and obvious; easily decided.
open and shut case noun: A problem that can be solved quickly and easily.
open-armed adjective: Having one's arms open and apart.
open-arse noun /ˈəʊpənɑːs/: The medlar fruit.
open assembly time noun: The measure of time commencing from the application of an adhesive on a substrate until it is assembled without the loss of bonding strength.
open-back adjective: Of headphones: only partially covering the ear, so that there is airflow to the wearer's ears.
open ball noun: The set of all points in a metric space whose distance from a given point ("the open ball's center") is less than a given length ("the open ball's radius").
open banking noun: Third party API access to a consumer's banking data in order to create new services and products.
open bar noun: A bar at which drinks are served without charge, usually at a social event.

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.