2 Syllables: SU
bristle, Bristol, brittle, chisel, civil, cripple, crystal, cymbals, Cyril, distal, dwindle, fickle, fiddle, fiscal, giggle, grizzled, impulse, insult, jingle, Kimball, kindle, lineal, little, Michel, middle, mineral, mingle, minstrel, missile, Mitchell, nibble, Nichols, nickel, nimble, nipple, pickle, pistol, quibble, riddle, ripple, rivalled, scribbled, shingle, shrivelled, Sibyl, sickle, simple, sinful, single, spindle, sprinkle, swivel, symbol, thimble, thistle, tickle, tingle, tinkle, tinsel, tittle, trickle, triple, twinkle, vigil, virile, Whipple, whistle, wrinkle
3 Syllables: USU
acquittal, belittle, bilingual, committal, dismissal, epistle, initial, judicial, official, peripheral, provincial, rekindled
4 Syllables: UUSU
artificial, beneficial, intermingled, interstitial, prejudicial, sacrificial, superficial, unofficial
Found 88 words across 3 groupings. Skipped 42 excess words of a similar stem.