1 syllable:
air, ayr, bare, bear, beer, bier, birr, blair, blare, blear, blur, boar, boer, boor, bore, bur, burr, care, chair, cheer, chirr, chore, churr, claire, clear, core, corps, crore, cur, cure, dare, dear, deer, dire, doer, door, dour, dower, drawer, drear, ear, er, err, fair, fare, fear, fehr, fir, fire, flair, flare, floor, flour, for, fore, four, freyr, fur, gear, gere, glare, gore, greer, grier, hair, hare, hear, heir, here, herr, hire, hoar, hour, ire, jeer, jour, lair, lear, lohr, loire, lore, lour, lure, lyre, mare, meir, mere, mir, mire, moire, moor, moore, more, murre, myrrh, ne'er, near, nor, oar, or, ore, pair, pare, pear, peer, per, pier, poor, pore, pour, prayer, pure, purr, queer, quire, rare, rear, roar, ruhr, scare, schmear, schorr, score, scour, sear, seer, sere, share, shear, sheer, sherr, shire, shirr, shmear, shore, sir, slur, smear, snare, sneer, snore, soar, sore, sour, spare, spear, sphere, spire, spoor, spore, spur, square, squire, stair, stare, steer, stir, store, sure, swear, swore, tear, their, there, they're, thor, tier, tor, tore, torr, tour, tyre, veer, war, ware, we're, wear, weir, were, where, whirr, whore, wire, wore, year, yore, you're, your

2 syllables:
abhor, abjure, abor, adhere, adjure, admire, adore, affair, affaire, afire, aflare, allure, amir, amour, appear, ashir, ashore, aspire, assur, assure, astaire, astir, austere, aware, before, besmear, beware, bonaire, bonheur, brochure, brumaire, bugbear, cared-for, career, cashier, chauffeur, cohere, coiffeur, coiffure, compare, compeer, compere, concur, confer, cooccur, couture, danseur, declare, decor, defer, demur, demure, deplore, derriere, despair, deter, detour, downstair, eclair, emir, endear, endure, ensnare, ensure, exmoor, expire, explore, fakeer, flexure, footgear, footsure, forbear, forswear, fourscore, foursquare, frontier, frotteur, galore, grandeur, gravure, guinier, hachure, handwear, horsehair, hot-wire, houhere, ignore, igor, immure, impair, implore, impure, incur, infer, inhere, inquire, inshore, inspire, insure, inter, inure, kaffir, kildeer, killdeer, languor, lenore, liqueur, longed-for, longueur, manure, markhoor, mature, menhir, midair, moliere, monsieur, nervure, o'hare, obscure, occur, offshore, outroar, outscore, parterre, pasteur, perspire, pierre, pindar, poseur, postwar, prefer, premier, premiere, prepare, prewar, procure, pushchair, rancour, rapport, recur, refer, rehear, repair, require, respire, rest-cure, restore, retire, revere, rigour, safire, salvor, sambur, sapir, secure, seigneur, senor, severe, shamir, sightseer, sincere, smoothbore, soilure, succour, t-square, tangier, tarsier, testiere, threescore, tonsure, transfer, trochlear, tussore, twoscore, unclear, unfair, unsure, upstair, vanir, vapour, velour, veneer, vigour, voltaire, voyeur, wafture, wasteweir, wheatear, yasir, zaire

3 syllables:
abampere, air-to-air, allosaur, amanpour, ankylosaur, anymore, archosaur, auctioneer, balladeer, bandoleer, bandolier, barosaur, basketeer, baudelaire, belvedere, billionaire, blackamoor, bombardier, brigadier, brontosaur, buccaneer, cannoneer, cavalier, chandelier, chevalier, chinaware, cockleburr, coinsure, commandeer, connoisseur, debonair, debonaire, debonnaire, disappear, disrepair, doctrinaire, domineer, elaphure, embouchure, encolure, engineer, ex-mayor, financier, gadgeteer, gazetteer, gomphothere, gondolier, gondoliere, guarantor, guinevere, hadrosaur, halberdier, harpooneer, heretofore, hoped-for, immature, insincere, interfere, kieselguhr, laissez-faire, lavalier, looked-for, man-of-war, megathere, millionaire, muleteer, musketeer, mutineer, nothosaur, open-air, overbear, overhear, pamphleteer, paramour, persevere, pied-a-terre, pioneer, pistoleer, plesiosaur, porte-cochere, premature, presbyter, privateer, profiteer, pterosaur, puppeteer, questionnaire, racketeer, raconteur, re-explore, reappear, reassure, reinsure, restaurateur, saboteur, savoir-faire, scrutineer, secretaire, seismosaur, sinecure, sloganeer, solitaire, sonneteer, souvenir, stegosaur, tamanoir, tug-of-war, unaware, uncalled-for, underscore, volt-ampere, volunteer, warrantor, wirehair, wished-for, yearned-for

4 syllables:
apatosaur, candidature, carabineer, ceratosaur, charioteer, commissionaire, concessionaire, conventioneer, corythosaur, dromaeosaur, entrepreneur, ichthyosaur, ictodosaur, litterateur, milliampere, pelycosaur, photogravure, psittacosaur, rotogravure, staurikosaur, styracosaur, supersedure, surface-to-air, tyrannosaur, uintathere, uncared-for, unhoped-for, unlooked-for, unwished-for

5 syllables:
heliogravure, kilovolt-ampere

6 syllables:
pachycephalosaur