2 Syllables: SU
blissful, bristle, Bristol, brittle, chisel, civil, cripple, crystal, Cyril, dismal, distal, fickle, fiddle, fiscal, giggle, grizzled, Israel, Israel's, little, Michel, middle, missiles, Mitchell, nibble, Nichols, nickel, nipple, pickle, pistol, quibble, riddle, ripple, rivalled, scribbled, shrivelled, Sibyl, sickle, swivel, thistle, tickle, tittle, trickle, triple, trivial, vigil, virile, Whipple, whistle, wishful, wistful
3 Syllables: USU
acquittal, baptismal, belittle, committal, convivial, dismissal, epistle, initial, judicial, official, peripheral
4 Syllables: UUSU
Found 68 words across 3 groupings. Skipped 23 excess words of a similar stem.