2 syllables:
bestar, bester, brester, chester, crestor, ester, esther, estre, eszter, fester, hester, jester, kester, leicester, lester, lestr, maestre, mester, mestre, nester, nestor, pester, pressed her, prester, quaestor, questar, quester, questor, rester, schwester, sester, tester, testor, trester, vestar, vester, westar, wester, wrester, yester, yester-, zester, booster, brewster, klooster, qustor, rooster, schuster, souwester, to stir, wooster

3 syllables:
addressed her, amvestor, ancestor, antestor, arrester, arrestor, attester, attestor, bimester, bourgmestre, caressed her, colchester, contester, detestar, detester, digester, digestor, dorchester, enfester, expressed her, grantchester, impester, infester, investor, ivester, john lester, jon lester, lanchester, manchester, mclester, molestar, molester, northwester, norwester, portchester, protester, protestor, requester, requestor, ribchester, rochester, rupestre, semester, semestre, sequester, silchester, silvester, sou'wester, southwester, suggester, sylvester, sylvestre, taste-tester, terrestre, trimester, trimestre, undressed her, webmestre, wenchester, westchester, winchester, worchester, hell-rooster, lacustre, r.u.r., seduced her

4 syllables:
.308 winchester, arbalester, audrey mestre, child molester, earl of leicester, genus nestor, godmanchester, krankenschwester, manifester, mcalester, overpester, polyester, tastetester, thioester, toy manchester, veeblefester, introduced her, morale booster, paget brewster, takeoff booster

5 syllables:
cellulose ester, copolyester, extraterrestre, jordana brewster

6 syllables:
corporate investor, sharon duncan-brewster

9 syllables:
university of manchester

2 syllables:
oospore, smoothbore, zoospore

3 syllables:
tormentor, tormenter, hairdresser, bartender

4 syllables:
baroreceptor, vapour pressure