2 Syllables: SU
acids, actress, adage, Adams, Allen's, aptness, Arabs, asses, Athens, Atlas, atoms, axis, badness, ballads, baptised, Baptist, barons, batches, blackest, blackness, cabbage, cabins, cactus, cannons, canons, captious, challenge, chaplains, chasms, classes, damage, dragons, factious, famines, fashions, fastens, fathoms, flatness, gallons, gases, gladness, glasses, grasses, gratis, habeas, hapless, happens, happiest, lapis, Latins, lattice, madness, Madras, Magnus, mammoth, manage, masses, matches, mattress, package, passage, passes, passions, patches, phantoms, rapids, rations, Sabbath, saddest, sadness, savage, scratches, slackness, spasms, status, talons, taxes, waggons, wagons
3 Syllables: USU
4 Syllables: UUSU
Found 88 words across 3 groupings. Skipped 7 excess words of a similar stem.