2 syllables:
bed-wetter, behter, better, bettor, debtor, detter, detur, etter, fetter, fretter, geter, getter, get her, guetter, heter, heter-, jetter, jetur, ketter, letter, let her, metter, mettere, mettre, mettur, met her, netter, petar, petr, petre, petter, retter, rhetor, schetter, setter, set her, shetter, stetter, sweater, tetter, tretter, tschetter, vetere, vetter, wetter, whetter, yetter, yet her

3 syllables:
abetter, abettor, air letter, barretor, barretter, bedwetter, begetter, besetter, black-letter, blackletter, black letter, block letter, bloodletter, boatsetter, bonesetter, chain letter, codebtor, commettre, crank letter, dead letter, embetter, enfetter, filmsetter, forgetter, forget her, form letter, four-letter, fumetere, gill-netter, gillnetter, go-getter, had better, insetter, jet-setter, kris tschetter, linkletter, love letter, news-letter, newsletter, night letter, pace-setter, pacesetter, permettre, pinsetter, pipetter, pipettor, projeter, red-letter, red setter, regretter, resetter, rivetter, roughsetter, short letter, small letter, softletter, soumettre, sujetar, touretter, transmettre, trend-setter, trendsetter, typesetter, unfetter, upsetter, upset her, usenetter, vignetter, vote-getter, wadsetter, wage setter, wohlstetter

4 syllables:
airmail letter, assujettir, business letter, carburetter, carburettor, english setter, gordon setter, imagesetter, irish setter, market letter, open letter, photosetter, rosentreter, scarlet letter, stellvertreter, to the letter, underletter, undersetter

5 syllables:
investment letter, personal letter, phototypesetter, teletypesetter, varsity letter

6 syllables:
encyclical letter, polyphonic letter

7 syllables:
h.a.m.m.e.r.

2 syllables:
seeder, detour, bleeder, chequer, beeper, cedar, meager, meagre, reaper, keeper, eager, breeder, beaker, feeder, squeaker, streaker, peeper, creeper, seeker, weeper, sleeper, speeder, leader, sneaker, t-bar, speaker, reader, wheatear, eagre, sweeper, becker, bedder, beggar, checker, cheddar, decker, eggar, egger, header, jaeger, leper, neckar, pepper, sledder, spreader, webber, weber, wrecker

3 syllables:
grim reaper, lip reader, beleaguer, loss leader, white cedar, red cedar, lay reader, besieger, floor leader, mind reader, bell pepper, bird pepper, black pepper, cone pepper, globe pepper, green pepper, hot pepper, housewrecker, long pepper, map-reader, painewebber, redheader, red pepper, sweet pepper, thought-reader, true pepper, wall pepper, white pepper

4 syllables:
carpet sweeper, incense cedar, spanish cedar, atlas cedar, betel pepper, cayenne pepper, cherry pepper, chili pepper, common pepper, guinea pepper, java pepper, spelling checker, syntax checker

5 syllables:
eastern red cedar, western red cedar, japanese cedar, port orford cedar, tabasco pepper

6 syllables:
majority leader, minority leader, madagascar pepper, parasitic jaeger