English words: obpandurate to obtunder

300 English words, part 4 of 67 of the words starting with O, A to Z. 57 have a page of their own.

English words obpandurate to obtunder

obpandurate adjective: Having a reverse pandurate shape, with the sinuosity toward the apex and the broadest part toward the base.
obpyramid adjective, noun: A pyramid with the apex downward; an inverse pyramid.
obpyramidal adjective: Pyramidal, but having the apex downward; inversely pyramidal.
obpyriform adjective: Having a shape that is in outline like that of a pear, with the base at the narrower end.
OBR noun: Initialism of overhead bridge restaurant.
Obrador proper noun /ˈəʊbɹədɔː(ɹ)/: A surname from Spanish
obradovicite noun: An orthorhombic-dipyramidal pea green mineral containing arsenic, copper, hydrogen, iron, molybdenum, oxygen, potassium, and sodium.
obrazovanshchina noun: a class of people with superficial education but without the higher ethics of an educated person
Obregon proper noun /oʊ.bɹeɪˈɡoʊn/: A surname from Spanish
obreniform adjective: Having a reverse reniform shape, with the petiole opposite the notch.
obreption noun /əbˈɹɛpʃən/: The act of creeping upon with secrecy or by surprise.
obreptitious adjective: Done or obtained by surprise, with secrecy, or by concealment of the truth.
obreptitiously adverb: In an obreptitious manner.
Obrero proper noun: A barangay of Quezon City, Metro Manila, Philippines.
obrogate verb /ˈɒbɹəɡeɪt/: To annul a law by enacting a new law, as opposed to repealing the former law.
obrogation noun: The act of obrogating.
obrok noun /əˈbɹoʊk/: A rent.
obroni noun: Alternative form of oburoni.
obrotund adjective: Nearly but not completely round; roundish.
obround noun: A plane shape consisting of two semicircles connected by parallel lines tangent to their endpoints.
obruption noun: Quick burial.
obrution noun: A rapid burial or smothering event.
obs adjective, noun: Alternative form of obs (obsolete)
obs and gynae noun: the study or field of obstetrics and gynaecology
obsagittate adjective: Of a reverse sagittate shape, with two pointed lobes extending at the apex.
obscene adjective, verb /əbˈsiːn/: Offensive to standards of decency or morality.
obscenely adverb: In an obscene manner; vulgarly.
obsceneness noun: Quality of being obscene.
obscenery noun: Synonym of obscenity.
obscenicon noun: Synonym of grawlix (“string of typographical symbols used to represent obscenity”).
obscenist noun: One who behaves obscenely, or produces obscene works.
obscenity noun: Something that is obscene.
obscurable adjective: Which can be obscured.
obscurancy noun: Synonym of obscurity.
obscurant adjective, noun /ɒbˈskjʊəɹənt/: Acting or tending to confound, obfuscate, or obscure.
obscurantic adjective: Employing obscurantism.
obscurantism noun: A state of opposition to human progress or enlightenment.
obscurantist adjective, noun: A practitioner of obscurantism; an obscurant.
obscurantistic adjective: Of or relating to obscurantism.
obscurantly adverb: In an obscurant (that is, obscuring or obfuscating) way; in such a way as to obscure; obfuscatingly.
obscurate verb: To obscure.
obscuration noun: The state of being obscured.
obscurationism noun: The policy of obscuration.
obscurative adjective: Tending to obscure; making something unclear or abstruse.
obscure adjective, verb /əbˈskjʊə(ɹ)/: Dark, faint or indistinct.
obscure honeyeater noun: Caligavis obscura, a honeyeater species found in New Guinea.
obscured adjective, verb: Made hidden, less visible, or dark.
obscuredly adverb: In an obscured manner.
obscurely adverb /əbˈskjʊəli/: In an obscure manner.
obscurement noun: The act of obscuring, or the state of being obscured.
obscureness noun: The state or quality of being obscure.
obscurer adjective, noun: One who, or that which, obscures.
obscurification noun: The act of making something obscure, or (in computing) obfuscating source code etc.
obscurify verb: to make obscure
obscurin noun: A protein in humans, related to titin and nebulin.
obscuring noun, verb: The process of making obscure; a concealing or darkening.
obscuringly adverb: So as to obscure something.
obscurism noun: The practice of being obscure.
obscurist noun: One who creates ambiguous works.
obscurity noun /əbˈskjʊəɹɪti/: Darkness; the absence of light.
obscurum per obscurius phrase: Synonym of ignotum per ignotius (“explaining an obscure subject by resort to one even more obscure”).
obsd. verb: Abbreviation of observed.
obsecrate verb: To beseech; to supplicate; to implore.
obsecration noun: An earnest supplication made in the name of God
obsecratory adjective /ɒbˈsɛkɹətəɹi/: Expressing, or used in, entreaty; supplicatory.
obsequence noun: Compliance, obsequiousness, deference, willingness to serve.
obsequency noun: obsequiousness
obsequent adjective, noun: Obedient; submissive; obsequious.
obsequial adjective: Relating to an obsequy or funeral rite.
obsequiate verb /əbˈsiː.kwi.eɪt/: To be obsequious to (someone).
obsequience noun: obsequiousness
obsequies noun /ˈɒbsəkwiːz/: Funeral rites.
obsequiosity noun: Obsequiousness.
obsequious adjective /əbˈsiːkwi.əs/: Excessively eager and attentive to please or to obey instructions; fawning, subservient, servile.
obsequiously adverb: In an obsequious manner.
obsequiousness noun: The quality of being obsequious; servile compliance.
obsequity noun: The state of being obsequious; unctuousness
obsequy noun /ˈɒbsəkwiː/: The last office for the dead.
observability noun: The state of being observable.
observable adjective, noun /əbˈzɜː.və.bəl/: Able to be observed.
observable universe noun: The extent of a universe within the cosmological horizon of an observer.
observableness noun: observability
observably adverb: To a detectable degree, sufficient to be observed.
observance noun /əbˈzɝvəns/: The practice of complying with a law, custom, command or rule.
observandum noun /ˌɒbzə(ɹ)ˈvændəm/: A thing to be observed.
observant adjective, noun /əbˈzɝvənt/: Alert and paying close attention; watchful.
Observantine adjective, noun: Of or pertaining to the Observant branch of Franciscan friars
Observantism noun: The religious beliefs and practices of the Observants.
Observantist noun: Synonym of Observant (“member of Franciscan order”).
observantly adverb: In an observant manner.
observantness noun: Quality of being observant.
observate verb: To observe.
observation noun /ˌɒbzəˈveɪʃn̩/: The act of observing, and the fact of being observed (see observance)
observation balloon noun: A type of balloon that is employed as an aerial platform for intelligence gathering and artillery spotting.
observation car noun: A railway passenger car made so as to facilitate seeing the scenery en route, sometimes with glass sides or with a kind of open balcony at the rear.
observation deck noun: An area of a tall building, often open to the sky, from which the public may look at the surrounding panorama.
observation hut noun: A rudimentary building used by people making field observations.
observation post noun: a lookout or vantage point
observation tower noun: a structure used to view events from a long distance and to create a full 360 degree range of vision
observation tree noun: Synonym of camouflage tree.
observation wheel noun: Ferris wheel
observational adjective /ˌɒbzəˈveɪʃənəl/: Relating to observation, especially scientific observation.
observational comedy noun: A style of comedy based on observations about everyday life.
observational error noun: The difference between a measured value of a quantity and its true value.
observational learning noun: Learning that occurs as a function of observing, retaining and, in the case of imitation learning, replicating novel behavior executed by other people.
observationalism noun: The philosophical approach that derives knowledge from observations.
observationalist noun: One who relies on empirical observations.
observationality noun: The property of being observational.
observationally adverb: In an observational way.
observationally stable adjective: Of a nuclide (isotope): theoretically capable of radioactive decay (on the grounds that it would be energy-profitable), but not having been observed to do so.
observative adjective, noun: observant; watchful
observator noun /ɒbˈzɜːvətə/: An observer.
observatorial adjective: Relating to an observatory.
observatorium noun: An observatory.
observatory noun /əbˈzɜːvət(ə)ɹi/: A place where stars, planets and other celestial bodies are observed, usually through a telescope; also place for observing meteorological or other natural...
observe noun, verb /əbˈzɜːv/: To notice or view, especially carefully or with attention to detail.
observed adjective, verb /əbˈzɝvd/: Exceptionally celebrated on a date other than the usual date.
observedly adverb: In a way that is observed.
observee noun: One who is observed.
observer noun /əbˈzɝvɚ/: One who makes observations, monitors or takes notice.
observer's paradox noun: The situation in which a phenomenon being observed for study is unintentionally influenced by the presence of the observer.
observeress noun: A female observer.
observerless adjective: Without observers.
observership noun: The office or work of an observer.
observin' verb: Pronunciation spelling of observing.
observing adjective, noun, verb /əbˈzɝvɪŋ/: observation
observingly adverb: Attentively, observantly.
obsesh noun: Obsession.
obsess verb /əbˈsɛs/: To be preoccupied with a single topic or emotion.
obsessed adjective, verb /əbˈsɛst/: Intensely preoccupied with or by a given topic or emotion; driven by a specified obsession.
obsessedly adverb: With an obsession.
obsessedness noun: The quality of being obsessed; obsession.
obsessee noun: One who is the object of someone's obsession.
obsessingly adverb: With an obsession; obsessively.
obsession noun /əbˈsɛʃən/: The quality of being obsessed; an unshakeable feeling that one topic or activity must be pursued above other interests.
obsessional adjective: Marked by obsession
obsessionalism noun: obsessive behaviour
obsessionality noun: The quality of being obsessional.
obsessionally adverb: In an obsessional manner.
obsessionism noun: Obsessiveness.
obsessionist noun: A person who has an obsession; an obsessive.
obsessive adjective, noun /əbˈsɛs.ɪv/: Prone to cause obsession.
obsessive-compulsive adjective: Characterized by obsessions and compulsions, especially by the need to perform repetitive tasks.
obsessive-compulsive disorder noun: A mental and behavioral disorder, characterized by obsessive intrusive thoughts and a compulsion to ease the resulting distress by repeating specific...
obsessive-compulsive disordered adjective: Having obsessive-compulsive disorder.
obsessive-compulsive personality disorder noun: A personality disorder characterized by an extreme pattern of concern with orderliness, perfectionism, excessive attention to details, mental and...
obsessive-compulsive personality disordered adjective: Having obsessive-compulsive personality disorder.
obsessive compulsive spartanism noun: Synonym of compulsive decluttering.
obsessive-compulsiveness noun: The state of being obsessive-compulsive.
obsessive-compulsivity noun: The state of being obsessive-compulsive.
obsessive love disorder noun: A mental health condition in which a person feels an overwhelming obsessive desire to possess and protect another person, sometimes with an inability to...
obsessively adverb: In an obsessive manner.
obsessiveness noun: The characteristic of being obsessive.
obsessoid adjective: Showing resemblance to obsessive-compulsive disorder.
obsessor noun: One who is obsessive about something.
obsidian adjective, noun /ˌɒbˈsɪd.i.ən/: A type of naturally occurring black glass produced by volcanoes.
obsidional adjective /əbˈsɪdɪənəl/: Pertaining to a siege.
obsidional coin noun: A coin made in a besieged city, often impure or made from inferior materials.
obsidional crown noun: Synonym of grass crown.
obsidionary adjective: obsidional; relating to a siege
obsidious adjective: besieging; besetting, obsessional
obsign verb /əbˈsaɪn/: To seal; to confirm, as by a seal or stamp.
obsignate verb /ˈɒbsɪɡneɪt/: To seal or ratify.
obsignation noun: The act of sealing or ratifying.
obsignatory adjective: Ratifying; confirming by sealing.
obsn. noun: Abbreviation of observation.
obsolesce verb /ˌɒbsəˈlɛs/: To become or be rendered obsolete; to undergo obsolescence.
obsolescence noun /ˌɒb.səˈlɛs.əns/: The state of being obsolete–no longer in use; gone into disuse; disused or neglected.
obsolescent adjective /ɒbsəˈlɛsənt/: In the process of becoming obsolete, but not obsolete yet.
obsolescently adverb /ɑbsəlˈɛsəntli/: In an obsolescent manner.
obsolete adjective, noun, verb /ˈɒbsəliːt/: No longer in use or no longer useful; now disused or neglected (often in favour of something newer, better, or more fashionable); outmoded.
obsoletely adverb: When out of date or no longer in use.
obsoleteness noun: The quality or state of being obsolete or no longer in use.
obsoleter noun: Something which obsoletes something else.
obsoletion noun: Obsolescence.
obsoletism noun: A disused word or phrase; an archaism.
obsoletor noun: Something which obsoletes something else.
obsonator noun: A caterer, a manciple.
obsr. noun: Abbreviation of observer.
Obst proper noun: A surname from German.
obstacle noun /ˈɒbstəkəl/: Something that impedes, stands in the way of, or holds up progress, either physically or figuratively
obstacle course noun: A course with a series of physical challenges (running, climbing, swimming, etc.) to be performed sequentially.
obstacle race noun: A race on foot through an obstacle course.
obstacle-ridden adjective: impeded or plagued by obstacles.
obstacular adjective: Being or relating to an obstacle.
obstaculate verb /əbˈstækjʊˌleɪ̯t/: To act as an obstacle to; to impede, obstruct.
obstancy noun: Opposition, impediment, or obstruction.
obstet. noun: Abbreviation of obstetrics.
obstetr. noun: Abbreviation of obstetrics.
obstetric adjective /əbˈstɛtɹɪk/: Of or relating to obstetrics (the care of women during and after pregnancy).
obstetric toad noun: Synonym of midwife toad.
obstetrical adjective: Alternative form of obstetric.
obstetrical toad noun: A European toad of the genus Alytes, especially Alytes obstetricans, the eggs of which are laid and then carried by the male, entwined around his legs and back.
obstetrically adverb: In terms of obstetrics
obstetricate verb: To assist in the manner or as if in the manner of a midwife.
obstetrication noun: obstetrics or midwifery
obstetrician noun /ˌɒbstəˈtɹɪʃən/: A physician who specializes in childbirth.
obstetrician-gynecologist noun: A physician specializing in the medical and surgical care of the female reproductive system, pregnancy, childbirth, and the postpartum period; commonly...
obstetricious adjective: Serving to assist childbirth; obstetric.
obstetricist noun: One who practices obstetrics; an obstetrician.
obstetrics noun /əbˈstɛ.trɪks/: The care of women during and after pregnancy.
obstetricy noun: obstetrics.
obstetrist noun: An obstetrician.
obstetrix noun: A midwife.
obstinacious adjective: obstinate
obstinacy noun /ˈɑbstɪnəsi/: The state, or an act, of stubbornness or doggedness.
obstinance noun: The characteristic of being obstinate.
obstinancy noun: Obstinance; the characteristic of being obstinate.
obstinant adjective: Obstinate.
obstinate adjective /ˈɒb.stɪ.nət/: Stubbornly adhering to an opinion, purpose, or course, usually with implied unreasonableness; persistent.
obstinately adverb /ˈɑbstɪnətli/: In an obstinate manner.
obstinateness noun: The characteristic of being obstinate.
obstination noun: stubbornness
obstinative adjective: obstinate
obstinence noun: Synonym of obstinacy; Misspelling of obstinance.
obstipate verb: To induce severe constipation through an intestinal blockage
obstipation noun /ɑbstɪˈpeɪʃən/: severe constipation caused by intestinal obstruction.
obstipational adjective: Of or relating to obstipation.
obstipum abdomen noun: Congenital problem where the rectus abdominus muscle is too short.
obstrepalous adjective: obstreperous
obstreperate verb: To make a loud noise.
obstreperosity noun: The state of being obstreperous.
obstreperous adjective /əbˈstɹɛp.əɹ.əs/: Attended by, or making, a loud and tumultuous noise; boisterous.
obstreperously adverb: In an obstreperous manner.
obstreperousness noun: The quality of being obstreperous.
obstriction noun: The state of being constrained, bound, obliged, or obligated.
obstringed adjective: constrained; placed under obligation
obstropalous adjective: Alternative form of obstropulous.
obstropolous adjective: Alternative form of obstropulous.
obstropulous adjective /ɒbˈstɹɒp.jʊl.əs/: Synonym of obstreperous.
obstropulousness noun: The quality of being obstropulous.
obstruct verb /əbˈstɹʌkt/: To block or fill (a passage) with obstacles or an obstacle.
obstruct the field verb: To get out by deliberately obstructing a fielder in order to prevent him from making a catch or run out, or from gathering the ball (very rare).
obstructable adjective: Able to be obstructed.
obstructant noun: That which obstructs; an obstruction.
obstructedly adverb: While being obstructed.
obstructedness noun: The quality of being obstructed.
obstructible adjective: Alternative form of obstructable.
obstructingly adverb: So as to obstruct.
obstruction noun /əbˈstɹʌk.ʃən/: The act of obstructing, or state of being obstructed.
obstruction of justice noun: Interference with the administration of law and justice, as by ignorance of a justification, fraud of evidential validity, or not disclosing discovery of...
obstructional adjective: Being or relating to an obstruction.
obstructionally adverb: As, or by way of, an obstruction; obstructively.
obstructionism noun /əbˈstɹʌk.ʃən.ɪz(.ə)m/: A deliberate policy of obstructing something, especially a political process or body.
obstructionist adjective, noun /əbˈstɹʌk.ʃənˌɪst/: Someone who systematically obstructs the actions of others.
obstructionistic adjective: Relating to, or supporting, obstructionism.
obstructive adjective, noun /əbˈstɹʌk.tɪv/: Causing obstructions.
obstructively adverb: In an obstructive manner.
obstructiveness noun: The characteristic of being obstructive.
obstructivism noun: A tendency to obstruct the activities of others.
obstructor noun: Alternative form of obstructer.
obstruency noun: The condition of being obstruent.
obstruent adjective, noun /ˈɒbstɹuːənt/: Causing obstruction; blocking up.
obstruse adjective /əbˈstɹuːs/: Abstruse.
obstrusive adjective: Abstruse.
obstupefaction noun: stupefaction
obstupefy verb: To stupefy.
obsubulate adjective: Very narrow, pointed at the base and widening a little towards the apex.
OBT noun: Initialism of orange baboon tarantula.
obtain verb /əbˈteɪn/: To get hold of; to gain possession of, to procure; to acquire, in any way.
obtainability noun: The property of being obtainable.
obtainable adjective /əbˈteɪnəbl̩/: Able to be obtained.
obtainal noun: The obtaining of something; acquisition.
obtainance noun: The obtaining of something; acquisition.
obtainer noun: One who obtains.
obtainment noun /əbˈteɪn.mənt/: The act of obtaining something; acquisition.
obtect adjective: Having the legs and other appendages more or less strongly cemented to the body.
obtected adjective: covered; protected
obtectomeran noun: Any moth in the clade Obtectomera.
obtemper verb: To obey (a judgement, rule, decree etx.).
obtemperate verb: To obey, comply or submit to.
obtenance noun: the act of obtaining something
obtend verb /ɒbˈtɛnd/: To oppose; to hold out in opposition.
obtenebration noun: The act of darkening, or darkness.
obtension noun: The act of obtending.
obtention noun: The act of obtaining.
obtest verb /ɒbˈtɛst/: To implore, beseech, plead, beg.
obtestate verb: To beseech.
obtestation noun: The act of obtesting; supplication; protestation.
obtrapeziform adjective: trapeziform, but attached by the narrower trapezoidal base
obtrectation noun: Disparagement, the belittling of someone or something; slander.
obtriangular adjective: triangular with the apex downwards
obtrude verb /əbˈtɹuːd/: To proffer (something) by force; to impose (something) on someone or into some area.
obtruder noun: Someone who obtrudes.
obtruding noun, verb: An obtrusion; the act of something that obtrudes.
obtrullate adjective: In the form of a reversed trowel (with longer sides meeting at the base)
obtruncate verb: To truncate or lop the head off, to decapitate (also figurative).
obtruncation noun: The act of lopping or cutting off.
obtrusion noun: An interference or intrusion.
obtrusive adjective /əbˈtɹuːsɪv/: Of a person: overly assertive, bold, or domineering; pushy; also, ostentatious.
obtrusively adverb: In an obtrusive manner.
obtrusiveness noun: The characteristic of being obtrusive.
obtrusivity noun: Synonym of obtrusiveness.
obtuanhydride noun: A lichen-derived cyclic acid anhydride diterpene with IUPAC name...
obtund verb /əbˈtʌnd/: To reduce the edge or effects of; to mitigate; to dull.
obtundation noun: Decreased level of alertness or consciousness
obtunded adjective, verb: Far from alert or oriented to time and space, and exhibiting other signs of being confused, a state just short of frank delirium.
obtundedness noun: The quality or state of being obtunded; non-alertness.
obtundent noun: A substance which sheathes a part, or blunts irritation, usually some bland, oily, or mucilaginous matter; – nearly the same as demulcent.
obtunder noun: That which obtunds or blunts; especially, that which blunts sensibility.

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.