oar, n. paddle, scull, spoon oar. Associated Words: rowlock, loom, blade, wash, oarlock.

oar-shaped, a. remiform.

oat grasses. Avena. Associated Words: avenaceous, oaten.

oath, n. adjuration, pledge, sworn promise; curse, profanity, swearing, expletive, blasphemy. Associated Words: juratory, profane, imprecate.

oath-breaking, n. perjury.

obedience, n. compliance, submission, subservience; dutifulness. Antonyms: disobedience, incompliance, defiance, revolt, insubordination.

obedient, a. submissive, tractable, deferential, subservient, compliant, dutiful, docile, amenable. Antonyms: unsubmissive, intractable, disobedient.

obelisk, n. Associated Words: pyramidion, monolithic, hieroglyphics.

obey, v. comply, submit to, heed, regard, be ruled by.

object, v. disapprove, oppose, demur, contravene, gainsay, except, cavil.

object, n. thing, article; goal, purpose, aim, motive, intent, design, target, butt, destination, view.

objection, n. exception, scruple, demurrer, cavil. Antonyms: approval, acquiescence.

objectionable, a. exceptionable, offensive, obnoxious, undesirable, displeasing.

objectless, a. aimless, desultory, purposeless, vague.

obligation, n. accountableness, responsibility, incumbency, duty, indebtedness; agreement, contract, stipulation, covenant, bond.

obligatory, a. binding, incumbent, imperative, coercive. Antonyms: optional, discretional.

oblige, v. constrain, obligate; please, gratify, accommodate, coerce, compel, necessitate, force.

obliging, a. complaisant, gracious, accommodating, affable, debonair, deferential, yielding.

obliterate, v. efface, erase, blot out, remove, destroy, expunge.

obliteration, n. extinction, erasure, effacement, removal.

oblivious, a. unmindful, unconscious, forgetful, heedless, disregardful.

obnoxious, a. subject, liable; offensive, odious, hateful, displeasing.

obscene, a. smutty, lewd, gross, indecent, immodest, indelicate, ribald.

obscenity, n. lewdness, smut, ribaldry, indecency, bawdiness, immodesty.

obscure, a. abstruse, vague, recondite, indefinite, ambiguous; humble, inglorious, mean, undistinguished; secluded, retired, remote; shaded, darkened.

obscure, v. darken, obfuscate, bedim, eclipse; involve, dissemble, disguise, confuse.

obscuring, n. obscuration, obscurity.

obscurity, n. ambiguity, vagueness; privacy, seclusion, retirement; darkness, obfuscation, obscuration.

obsequious, a. sycophantic, cringing, fawning, deferential, servile.

obsequiousness, n. sycophancy.

obsolete, a. disused, archaic, antiquated, unfashionable, old-fashioned.

obstacle, n. obstruction, barrier, impediment, hindrance, stumbling-block.

obstetrician, n. midwife, accoucheur.

obstetrics, n. tocology, midwifery.

obstinacy, n. incompliance, doggedness, perversity, obduracy, intractability, stubbornness.

obstinate, a. incompliant, intractable, mulish, perverse, dogged, contumacious, stubborn. Antonyms: amenable, yielding, tractable, submissive, compliant, obedient.

obstreperous, a. clamorous, vociferous, noisy, uproarious, boisterous.

obstruct, v. impede, oppose, retard, barricade, blockade, clog, interrupt, bar, restrain.

obstruction, n. obstacle, impediment, barrier, blockade, restraint.

obtain, v. gain, get, procure, acquire, win, attain, secure.

obtainable, a. procurable, attainable, accessible. Antonyms: unobtainable, unprocurable, unattainable, inaccessible.

obtrusive, a. officious, meddlesome, intrusive, forward. Antonyms: inobtrusive, retiring.

obvious, a. plain, evident, palpable, manifest, patent, self-evident.

occult, a. mystic, mystical, abstruse, recondite, secret, unrevealed.

occupant, n. occupier, tenant, holder, incumbent, possessor, lessee.

occupation, n. occupancy, tenure, incumbency; vocation, employment. See business.

occupational, a. vocational.

occupy, v. hold, keep, possess, fill; engage, absorb, employ, busy, monopolize.

ocean, n. main, deep. Associated Words: oceanic, interoceanic, doldrums, oceanography, oceanology, terrigenous, Oceanus, transoceanic.

odd, a. unmatched, single, uneven; singular, peculiar, unusual, unique, strange, quaint, extraordinary, queer, eccentric, whimsical, freakish, baroque, fantastic, nondescript, abnormal, bizarre, erratic, unconventional, curious, capricious; extra, remaining, additional, redundant, casual, supernumerary.

oddity, n. oddness, singularity; curiosity, nondescript, marvel, wonder.

odds, sing, and pl. advantage, preponderance, inequality, disparity; probability.

odds and ends. remnants, fragments, orts, culls, scraps.

odious, a. detestable, abominable, execrable, offensive, repulsive, hateful, loathsome.

odium, n. detestation, unpopularity, hatred, contempt, dislike, opprobrium.

odor, n. smell, aroma, fragrance, scent, redolence, perfume, savor; stink, stench, fetor. Associated Words: deodorize, deodorization, deodorant, deodorizer, antibromic, disinfectant, disinfect, disinfection, exhale, exhalation, effluvium, emanation.

odorless, a. inodorous, savorless, scentless.

odorous, a. odoriferous, fragrant, savory, aromatic, balmy, scented.

offal, n. refuse, waste, rubbish, garbage.

offend, v. displease, affront, provoke, mortify, exasperate, incense, wound, shock.

offender, n. delinquent, wrong-doer, trespasser, malefactor, culprit, criminal.

offense, n. crime, wrong, sin, outrage, indignity; displeasure, resentment, dudgeon, umbrage; misdemeanor, transgression, delinquency, trespass.

offensive, a. obnoxious, displeasing, noisome, distasteful, insolent, abusive, aggressive, assailant, fetid, disagreeable, opprobrious, scurrilous, fulsome.