Or search: dun, rag, vex, fuss, goad, haze, rile, nark, annoy, beset, chafe, chevy, devil, harry, scrap
2 Syllables: SU
adult, agile, annals, annul, annulled, apple, babble, Babel, baffle, barrel, bashful, Basil, Basle, battle, camel, Carol, Carroll, Cassel, castle, cattle, cavil, channel, chapel, chattel, crackle, dazzle, facile, flannel, fragile, grapple, gravel, jackal, mammal, national, natural, paddle, panel, Paschal, prattle, rabble, rascal, rational, rattle, saddle, scaffold, shackled, shackles, tackle, tassel, trammels, travel, travelled, travels, vassal, wrathful
3 Syllables: USU
apparel, dismantled, embattled, enamel, enamelled, Seattle, unravel, untrammelled

Found 63 words across 2 groupings. Skipped 30 excess words of a similar stem.