1 Syllable: S
2 Syllables: SU
beaver, Beecher, breeder, briefer, Caesar, cedar, Cesar, cheaper, cleaner, clearer, creature, creeper, dealer, dearer, deeper, dreamer, eager, Easter, Eastern, eastward, eater, either, emerge, ether, feature, feebler, feeder, fever, fiercer, greener, healer, hearer, heater, keener, keeper, leader, leeward, leisure, lever, liter, livre, meager, meagre, meaner, meter, metre, mirror, nearer, neither, Peter, pleader, preacher, reader, reaper, research, rigour, seaward, seeker, seizure, sleeper, speaker, steamer, steeper, streamers, sweeter, teacher, weaker, weaver, Wheeler, Wiener
3 Syllables: USU
beleaguered, believer, besiegers, deceiver, demeanor, demeanour, northeastern, posterior, procedure, receiver, Redeemer, saltpetre, southeastern
3 Syllables: UUS
4 Syllables: UUSU
Found 90 words across 5 groupings. Skipped 47 excess words of a similar stem.