Obvious - plain, apparent, open, clear, evident, visible, manifest.

Occupation - work, profession, calling, trade, business, avocation, employment.

Occupy - keep, hold, use, possess.

Occurrence - event, contingency, adventure, incident.

Odor - smell, fragrance, perfume, scent.

Offense - trespass, crime, injury, sin, outrage, insult, misdeed, wrong, transgression.

Offensive - mean, abusive, insulting, impertinent, insolent, rude, scurrilous, obnoxious, opprobrious.

Officious - busy, active, forward, obtrusive, intrusive. Only - solely, singly, alone, simply, merely.

Open - unravel, reveal, disclose, unlock.

Opening - fissure, aperture, hole, cavity.

Operation - performance, action, agency.

Opinion - belief, idea, sentiment, notion.

Opinionated - obstinate, stub-born, stiff, egotistical, conceited, self-willed.

Opponent - opposer, adversary, toe, enemy, antagonist.

Opposite - contrary, repugnant, adverse.

Opprobrious - reproachful, insolent, abusive, offensive, insulting, scandalous, scurrilous.

Opprobrium - shame, disgrace, reproach, infamy, ignominy.

Oration - speech, sermon, lecture, discourse, address, harangue.

Ordain - appoint, invest, order, prescribe.

Order - brotherhood, fraternity, rank, method, succession, series, degree, genus.

Order - mandate, injunction, precept, command.

Orderly - precise, regular, systematic, methodical.

Ordinary - usual, common.

Origin - rise, cause, source, foundation, beginning, descent, fountain.

Original - primitive, first, pristine, primary.

Ornament - decorate, beautify, adorn, deck, embellish.

Ornate - decorated, adorned, embellished, bedecked, garnished.

Ostentation - parade, show, display, boast.

Outrage - insult, injure, affront, violence.

Outward - extraneous, apparent, intrinsic.

Overbearing: - repressive, impertinent, haughty, lordly.

Overcome - vanquish, conquer, surmount, subdue. Overflow - fill, inundate, deluge, abound.

Overnight - mistake, error, misapprehension, inattention.

Overwhelm - overpower, crush, upturn, overthrow, subdue.

Owner - holder, proprietor, master, possessor.

P

Pacify - calm, still, quiet, soothe, conciliate.

Pain - distress, afflict, torture, torment, suffer, hurt.

Paint - portray, represent, depict, sketch, color, describe, delineate.

Pair - join, two, couple, brace.

Pale - fade, wan, white, pallid, fair.

Palpable - gross, plain, apparent, discernible, perceptible.

Palpitate - tremble, throb, beat, flutter, gasp, pant.

Pang - torture, torment, distress, agony, anguish, sorrow.

Pardon - acquit, forgive, clear, free, discharge, release, remit.

Parsimonious - mean, frugal, miserly, avaricious, penurious, niggardly.

Part - share, portion, division, piece, action.

Particular - individual, specific, exact. appropriate, circumstantial, peculiar, exclusive, punctual, distinct.

Particularly - chiefly, mainly, principally, especially, distinctly, specifically.

Partisan - disciple, adherent, follower.

Partner - associate, accomplice, colleague, coadjutor.

Passion - desire, feeling, love, anger, excitement.

Passionate - hot, angry, irascible, hasty, excitable.

Passive - submissive, unresisting, patient, resigned.

Pathetic - affecting, touching, moving.

Patience - endurance, fortitude, resignation.

Patient - resigned, composed, enduring, calm, passive, an invalid.

Peaceable - quiet, calm, serene, tranquil, mild, gentle.

Peevish - fretful, disagreeable, petulant, cross, captious, irritable.

Penalty - punishment, pain, fine, forfeiture, chastisement.

Penitence - contrition, remorse, compunction, repentance.

Penurious - parsimonious, sparing, miserly, niggardly, beggarly.

Penury - want, poverty, distress, indigence, need.

Perceive - observe, discern, distinguish.

Perception - belief, conception, sentiment, idea, sensation, notion.

Peremptory - positive, despotic, arbitrary, dogmatical, absolute.

Perfect - done, complete, finished. Perfidious - false, treacherous, faithless.

Perforate - pierce, bore, penetrate.

Perform - execute, accomplish, effect, produce, achieye, fulfill.

Perfume - odor, smell, scent, exhalation, fragrance.

Period - circuit, date, age, epoch, era. Permit - allow, suffer, consent, admit, tolerate, yield.

Pernicious - noisome, ruinous, destructive, mischievous, hurtful, noxious.

Perpetual - uninterrupted, incessant, unceasing, constant, continual.

Perplex - bewilder, annoy, confuse, involve, molest, puzzle, embarrass, harass, entangle.

Persevere - endure, continue, persist, insist, pursue, prosecute.

Perspicuity - clearness, transparency, brilliancy.

Persuade - urge, induce, exhort, influence, entice, prevail upon.

Perverse - stubborn, untractable, unmanageable, crooked, cross.

Pestilential - destructive, mischievous, epidemical, infectious, contagious.

Petition - prayer, supplication, request, suit, entreaty.

Picture - likeness, image, effigy, representation.

Pious - spiritual, devout, godly, religious.

Pique - offense, grudge, dislike, malice, spite, rancor.

Pity - sympathy, commiseration, compassion, condolence, mercy.

Place - site, ground, post, position.

Placid - still, calm, gentle, quiet, tranquil, serene.

Plague - perplex, embarrass, tantalize, annoy, importune, vex, torment.

Plain - perceptible, discernible, manifest, obvious, clear, apparent, evident, distinct.

Plan - design, contrivance, device, scheme, arrangement, project, stratagem. Pleasant - cheerful, jocular, gay, vivacious, agreeable, facetious, witty.

Please - gratify, satisfy, humor, delight.

Pleasure - satisfaction, delight, happiness, enjoyment, joy.