1 syllable:
air's, airs, ayer's, ayres, baires, bares, bear's, bears, bears', berres, blair's, blares, bures, care's, cares, chaires, chairs, chares, claire's, dares, errs, eyres, fair's, faires, fairs, fares, feres, flairs, flares, freres, gares, gehres, gerres, glares, h-shares, hair's, hairs, hare's, hares, heirs, jares, jears, kehres, lairs, lares, lehrs, maerz, mairs, mare's, mares, nairs, pairs, pares, pears, phares, prayers, rairs, rares, sayres, scares, sgares, share's, shares, shares', sherr's, snares, spares, squares, stairs, stares, swears, tears, terres, theirs, there's, theres, verres, wares, wears, where's, wheres, xers

2 syllables:
affair's, affaires, affairs, agares, airfares, armchairs, backstairs, bancshares', bankshares, bewares, broadstairs, broodmares, bugbears, bulgars, caleres, carfares, compares, crosshairs, d'affaires, daffaires, daycares, deckchairs, declares, derrieres, despairs, downstairs, eclairs, ensnares, fanfares, fieldfares, forbears, forebears, forswears, frogwares, frontieres, funfairs, gaiares, healthcare's, highchairs, housewares, impairs, ishares, job's tears, least-squares, least squares, longhairs, markair's, menieres, moliere's, molieres, mujeres, nightmares, nowheres, outstares, parterres, pierre's, pierres, portieres, prepares, proshares, pushchairs, repairs, software's, somewheres, tenncare's, the heirs, time-shares, timeshares, unwares, upstairs, wheelchairs, aeries, aires, aries, barries, barry's, berries, berris, berry's, berrys, buries, bury's, burys, carey's, caries, carries, cherries, cherry's, claries, dairies, eyries, faeries, fairies, ferries, ferry's, ferrys, gary's, gerry's, harries, harry's, harrys, herreys, jerries, jerry's, jerrys, karis, kerrey's, kerries, kerry's, l-series, larry's, maries, marries, mary's, marys, p-series, parries, parrys, perries, perry's, prairie's, sherri's, sherries, sherry's, sherrys, skerries, steres, tarries, teres, terese, terries, terry's, terrys, their ease, varies, varys, wherries

3 syllables:
anywheres, armentieres, baby's tears, baby tears, betashares, billionaires, boutonnieres, charge d'affaires, common shares, cyaxares, delaware's, delawares, doctrinaires, down the stairs, flight of stairs, gemmipares, gondophares, jordanaires, kick downstairs, kick upstairs, legionnaire's, legionnaires, leochares, luminaires, medicare's, metameres, millionaire's, millionaires, overbears, populares, preferred shares, put on airs, questionnaires, regulares, save your tears, self-affairs, solitaires, sphecotheres, teddybears, thoroughfares, tubinares, unawares, understairs, underwears, up the stairs, usair's, we bare bears, world affairs, antares, aperies, aylesburys, baneberries, barberries, bayberries, bearberries, ben & jerry's, bilberries, blackberries, blaeberries, blueberries, boxberries, bullaries, bunchberries, burberries, burberrys, cadbury's, canaries, carberry's, chokeberries, chokecherries, cloudberries, costmaries, cowberries, cranberries, crowberries, dewberries, dogberries, equerries, ford f-series, gallberries, glengarries, gooseberries, gossaries, granaries, hackberries, histerese, hymnaries, inkberries, juneberries, knobkerries, libraries, library's, miscarries, mulberries, newbury's, otaries, pierie's, pillsbury's, piscaries, pokeberries, primaries, rameriz, raspberries, remarries, rosemaries, sainsburys, sectaries, sextaries, snowberries, soapberries, strawberries, subseries, sudbury's, teaberries, ternaries, thornberry's, thornberrys, thornbury's, thornburys, turbaries, votaries, waxberries, wildberries, wineberries, wolfberries, youngberries, zseries

4 syllables:
acridotheres, americares, authorized shares, commissionaires, concessionaires, kitchen nightmares, little nightmares, man of affairs, musical chairs, peninsulares, preference shares, state of affairs, treasury shares, accessaries, adversaries, ancillaries, apiaries, aviaries, axillaries, barillari's, boysenberries, breviaries, buenos aires, candleberries, canterbury's, capillaries, cassowaries, catenaries, cemeteries, centenaries, checkerberries, chinaberries, commentaries, commissaries, coralberries, corollaries, coronaries, dangleberries, dictionaries, dietaries, dignitaries, dingleberries, dispensaries, docu-series, dromedaries, elderberries, emissaries, estuaries, farkleberries, februaries, february's, formicaries, formularies, fritillaries, fructuaries, functionaries, huckleberries, insectaries, janissaries, januaries, january's, lamaseries, lapidaries, lectionaries, legionaries, lingonberries, loganberries, luminaries, mandataries, maxillaries, mercenaries, mesenteries, metaseries, militaries, military's, mini-series, miniseries, missionaries, monasteries, mortuaries, necessaries, ordinaries, ossuaries, ostiaries, partridgeberries, pensionaries, phalansteries, polyparies, proletaries, quaternaries, questionaries, reliquaries, rowanberries, salmonberries, sanctuaries, sanctuarize, savageries, secondaries, secretaries, secretaries', secretary's, seminaries, septenaries, serviceberries, solitaries, statuaries, subsidaries, temporaries, termitaries, tertiaries, the cranberries, thimbleberries, topiaries, tributaries, tunicaries, vestiaries, veterinaries, voluntaries, vulneraries, whortleberries, winterberries, zedoaries

5 syllables:
consumeraffairs, euromobiliare's, infernal affairs, method of least squares, multimillionaires, ordinary shares, the world's billionaires, antiphonaries, apothecaries, bicentenaries, concubinaries, confectionaries, confectioneries, constabularies, contemporaries, coparcenaries, cosignitaries, cotemporaries, depositaries, distributaries, electuaries, extraordinaries, fiduciaries, imaginaries, incendiaries, itineraries, judiciaries, juniper berries, justiciaries, obituaries, officiaries, pituitaries, preliminaries, proprietaries, prothonotaries, reactionaries, sexcentenaries, stipendiaries, subsidiaries, subsidiaries', subsidiary's, tercentenaries, vocabularies, voluptuaries

6 syllables:
beneficiaries, beneficiary's, eleemosynaries, intermediaries, paramilitaries, quatercentenaries, revolutionaries, supernumeraries, traveling wilburys, undersecretaries, usufructuaries, valetudinaries

7 syllables:
international affairs, master in public affairs, obedientiaries

8 syllables:
counterrevolutionaries

9 syllables:
department of veterans affairs

10 syllables:
secretary of veterans affairs