2 Syllables: SU
beetle, bristle, Bristol, brittle, Cecil, cereal, cheerful, chisel, civil, cripple, crystal, diesel, distal, eagle, easel, equal, equalled, equals, evil, fearful, febrile, feeble, fetal, fickle, fiddle, fiscal, giggle, grizzled, legal, lethal, little, measles, Michel, middle, missile, Mitchell, needle, nibble, Nichols, nickel, nipple, penal, people, pickle, pistol, quibble, regal, renal, riddle, ripple, rivalled, scribbled, sequel, serial, shrivelled, Sibyl, sickle, siecle, steeple, swivel, tearful, thistle, tickle, tittle, trickle, triple, venal, vigil, virile, weasel, Whipple, whistle
3 Syllables: SUU
3 Syllables: USU
acquittal, adrenal, arterial, bacterial, belittle, cathedral, coeval, committal, dismissal, enfeebled, epistle, ethereal, funereal, illegal, imperial, initial, judicial, material, medieval, official, peripheral, primeval, retrieval, unequal, unequalled, upheaval, venereal
4 Syllables: UUSU
artificial, beneficial, immaterial, interstitial, magisterial, managerial, mediaeval, ministerial, prejudicial, sacrificial, superficial, unofficial
Found 112 words across 4 groupings. Skipped 38 excess words of a similar stem.