2 Syllables: SU
boatman, Bolton, bonum, Bowen, Bowman, broken, chosen, chromium, cloven, coachman, cogent, Cohen, Coleman, colon, frozen, golden, Goldman, holden, homespun, loathsome, Logan, lonesome, modem, molten, moment, motion, notion, oaken, Oakland, ocean, odium, olden, Olson, omen, open, opium, Owen, poem, Poland, postman, potent, potion, Provence, quotient, rodents, Roland, Roman, Rosen, Rowan, Rowland, slogan, sodium, Solon, spoken, spokesman, stolen, swollen, token, totem, Trojan, woven, yeoman, yeomen
3 Syllables: SUU
3 Syllables: USU
ammonium, atonement, beholden, betokened, commotion, component, condolence, corrosion, custodian, devotion, emboldened, encomium, encroachment, enrollment, enrolment, erosion, eulogium, explosion, exponents, Ionian, Mongolian, Napoleon, Napoleon's, Newtonian, opponent, outspoken, petroleum, postponement, promotion, proponents, reopen, Smithsonian, Symposium, theologian, unbroken, unopened, unspoken, unwholesome, Utopian
4 Syllables: UUSU
Found 110 words across 4 groupings. Skipped 28 excess words of a similar stem.