2 Syllables: SU
blemish, checklist, chemist, cherish, clerics, credits, Denis, Dennis, devilish, Ellis, epics, Essex, ethics, fairest, fetish, Flemish, garish, Greenwich, Harris, hellish, herbage, marriage, menace, merits, Paris, parish, perish, prelates, premise, reddish, relics, relish, sheriff, sheriff's, surplice, tennis, Venice
3 Syllables: USU
aesthetics, athletics, cosmetics, disparage, domestics, embellish, genetics, hysterics, kinetics, obstetrics, Poetics, polemics, replenish, unblemished
4 Syllables: UUSU
Found 55 words across 3 groupings. Skipped 7 excess words of a similar stem.