2 Syllables: SU
barest, barrack, Becket, Bennett, carrot, chestnut, credit, crevice, despot, edit, eldest, epoch, Everett, ferret, ferrous, freshest, headless, heiress, helpless, jealous, legate, Lennox, Lenox, lettuce, menace, merest, merit, necklace, parrot, pellets, pelvis, precious, PREFACE, premised, rarest, reckless, restless, selfless, Senate, separate, setup, sheriff, tariff, tenet, tennis, terrace, trellis, trespass, Venice, waistcoat, wealthiest, zealots, zealous
3 Syllables: USU
asbestos, demerit, develop, develope, develops, discredit, embarrass, envelop, impetuous, incestuous, inherit, Marcellus, rebellious, umbrellas, Vincennes
4 Syllables: UUSU
5 Syllables: UUUSU
Found 70 words across 4 groupings. Skipped 19 excess words of a similar stem.