2 syllables:
smuggler

3 syllables:
front-runner, juggler, bubbler, umbellar, sublunar, lumpsucker, buckler, fructidor, provoker, tub-thumper, muscular, customer, subculture, gunrunner, trumpeter, hustler, cullender, bloodsucker, londoner, shuffler, ovenware, rumrunner, cellular, creditor, delaware, ecuador, editor, elater, eleanor, endospore, engler, escobar, genitor, headhunter, hellebore, jennifer, leicestershire, leveler, leveller, meddler, medicare, megaspore, messenger, metaphor, mevacor, nebular, pedaler, pedaller, pensioner, predator, presenter, questioner, reckoner, regular, reservoir, reveler, reveller, second-year, seconder, seminar, senator, sepulture, settler, sevener, stepmother, strengthener, temperature, wrestler

4 syllables:
stenographer, carbuncular, caruncular, acellular, art editor, asthenosphere, competitor, concessioner, confectioner, congenator, corregidor, cross-questioner, dead metaphor, developer, embezzler, executor, expenditure, high temperature, investiture, irregular, low temperature, noncellular, room temperature, sports editor, state senator, subeditor, text editor

5 syllables:
body temperature, business editor, city editor, copy editor, curie temperature, divine messenger, drunken reveler, frozen metaphor, linkage editor

6 syllables:
absolute temperature, managing editor, newspaper editor

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