3 syllables:
petitor

4 syllables:
repetitor

3 syllables:
editor, decolor, epicure, semaphore, sepulcher, stem-winder, nebular, breadwinner, hellebore, delaware, belshazzar, predator, headhunter, ecuador, creditor, metaphor, guenevere, spellbinder, encipher, specular, registrar, register, stepsister, senator, well-wisher, messidor, messenger, settler, metamere, secretaire, escolar, leveller, debugger, elater, prelature, seminar, stepmother, sepulture, hemisphere, reckoner, megathere, reservoir, cellular, tetraspore, questioner, wrestler, seconder, sepulchre, pedaler, begetter, regular, medicare, megaspore, premolar, belabour, presenter, temperature, pensioner, reveler, pedicure, stepbrother, stegosaur, secular, genitor, eleanor, endospore, engler, escobar, jennifer, leicestershire, leveler, meddler, mevacor, pedaller, reveller, second-year, sevener, strengthener, bedsitter, chelifer, demister, elinvar, gennifer, neckar river, redeker, schlesinger, threshing floor

4 syllables:
emmentaler, centromere, confectioner, noncellular, executor, cash register, dosemeter, irregular, progenitor, insectivore, expenditure, non sequitur, developer, molecular, acellular, divestiture, misdemeanour, investiture, subeditor, corregidor, text editor, room temperature, embezzler, ctenophore, art editor, asthenosphere, concessioner, congenator, cross-questioner, dead metaphor, high temperature, low temperature, sports editor, state senator, vulpecular, chest register, head register, left hemisphere, right hemisphere, umbellifer

5 syllables:
body temperature, southern hemisphere, western hemisphere, northern hemisphere, intracellular, primogenitor, extracellular, curie temperature, city editor, copy editor, linkage editor, eastern hemisphere, primogeniture, business editor, divine messenger, drunken reveler, frozen metaphor

6 syllables:
cerebral hemisphere, managing editor, differentiator, absolute temperature, newspaper editor

7 syllables:
capital expenditure, capital of delaware, capital of ecuador