1 Syllable: S
1, an, ance, been, blunt, brunt, bum, bump, bums, bun, bunch, bund, bunk, chron, chum, chunk, clump, clung, come, conf, cont, crumb, cum, done, donne, drum, drunk, dum, dumb, dump, dun, dung, dunn, duns, flung, from, front, fun, funds, funk, grunt, gum, gun, hm, hum, hummed, hump, hun, hunch, hung, huns, hunt, jump, jun, junk, leant, lump, lunch, lund, lung, ment, monk, month, mum, none, numb, nun, once, one, plum, plumb, plump, plums, plunge, pump, pun, punch, puns, rum, rump, run, rung, runs, scum, shrunk, shun, shunned, sions, slum, slump, slums, slung, slunk, some, son, sponge, sprung, spun, strung, stump, stung, stunned, stunt, sum, summed, sums, sun, sung, sunk, suns, swung, than, thumb, thump, ton, tongue, tons, trump, trunk, tum, tun, tung, um, un, won, wrung, young, young's
2 Syllables: SU
alum, beacon, beaten, chieftain, clearance, cleveland, credence, deacon, decent, deepen, demon, deviant, eastman, easton, eaten, eaton, eden, ephraim, eton, ference, freedman, freedmen, freedom, freeman, freeman's, frequent, friedman, grecian, greenland, grievance, heathen, helium, legion, leland, lenient, lesion, median, medium, museum, pekin, piquant, premium, prescience, reagent, reason, recent, refund, regent, region, seaman, seamen, season, semen, sequence, serum, stephen, steven, sweden, sweeten, tedium, theorem, treason, treatment, weaken, zealand
2 Syllables: US
affront, amiens, among, amongst, become, begun, benumbed, bodleian, confront, crimean, defunct, expunged, korean, lyceum, outdone, outrun, plebeian, succumb, therefrom, undone
3 Syllables: SUU
3 Syllables: USU
accretion, achievement, adherence, adherent, adhesion, agreement, allegiance, appearance, archdeacon, armenian, athenian, bereavement, bohemian, cartesian, chameleon, coherence, coherent, cohesion, comedian, completion, concealment, convenience, convenient, depletion, ephesians, excretion, expedient, impeachment, indecent, infrequent, ingredient, magnesium, norwegian, obedience, obedient, phoenician, policeman, secretion, uneven, unfrequent, venetian
3 Syllables: UUS
4 Syllables: UUSU
antecedent, athenaeum, caribbean, disagreement, disappearance, disobedience, disobedient, epicurean, epithelium, european, incoherence, incoherent, inconvenience, inconvenient, inexpedient, interference, mausoleum, paroxysms, perseverance, reappearance
5 Syllables: UUUSU
Found 280 words across 8 groupings. Skipped 94 excess words of a similar stem.