Or search: blab, clack, utter, prate, babble, tattle, gibber, jabber, piffle, chatter, prattle, smatter, twaddle, blabber, blether
2 Syllables: SU
actual, adult, agile, annals, annul, annulled, apple, axial, axle, babble, Babel, baffle, barrel, Basil, Basle, battle, camel, capsule, Carol, Carroll, Cassel, castle, cattle, cavil, channel, chapel, chattel, crackle, dazzle, facile, flannel, fragile, grapple, gravel, jackal, mammal, natural, paddle, panel, Paschal, prattle, rabble, rascal, rattle, saddle, scaffold, shackled, shackles, tackle, tactful, tassel, trammels, travel, travelled, travels, vassal
3 Syllables: USU
apparel, dismantled, embattled, enamel, enamelled, Seattle, unravel, untrammelled

Found 64 words across 2 groupings. Skipped 31 excess words of a similar stem.