1 Syllable: S
2 Syllables: SU
beaver, beecher, bidder, bigger, bitter, blister, blizzard, breeder, briefer, caesar, cedar, cesar, cheaper, cistern, cither, cleaner, clearer, clifford, clipper, creature, creeper, dealer, deeper, differ, digger, dinner, dreamer, eager, easter, eastern, eastward, eater, either, emerge, ether, feature, feebler, feeder, fever, fiddler, fiercer, filler, fischer, fisher, fissure, fitter, flicker, gifford, giver, glimmer, glitter, greener, healer, hearer, heater, hither, hitler, hitler's, inner, keener, keeper, killer, leader, leeward, leisure, lever, liquor, listener, lister, liter, litter, liver, livre, lizard, meager, meagre, meaner, meter, metre, miller, mirror, mister, nearer, neither, nigger, peter, pillar, pitcher, pleader, preacher, printer, pritchard, quicker, quiver, reader, reaper, research, richard, richer, rigor, rigour, ritter, river, schiller, scissors, seaward, seeker, seizure, shippers, shiver, sinner, sister, skinner, skipper, sleeper, slipper, speaker, spinner, steamer, steeper, streamers, sweeter, swimmer, teacher, thicker, thinner, thither, tiller, trigger, vicar, vigor, vigour, weaker, weaver, wheeler, whiskers, whisper, whither, wicker, wiener, willard, winner, wishers, wither, wizard
3 Syllables: USU
anterior, beginner, beleaguered, believer, besiegers, consider, deceiver, deliver, demeanor, demeanour, embitter, exterior, inferior, interior, northeastern, posterior, procedure, receiver, redeemer, saltpetre, southeastern, superior, transmitter, ulterior
4 Syllables: UUSU
Found 177 words across 4 groupings. Skipped 109 excess words of a similar stem.