2 Syllables: SU
Abbot, Abbott, agate, Alex, arras, asses, Assoc, Atlas, ballast, ballot, barrack, basket, batches, blackest, brackets, Cabot, Caliph, callous, carrot, casket, Cassius, classes, Dallas, damask, facet, faggots, gallop, gamut, gaseous, gases, glasses, grasses, gratis, gravest, habit, hammock, hapless, hatchet, havoc, jacket, Janet, lapis, lattice, Madras, malice, masses, matches, mattress, packet, paddock, Paget, palace, palate, palette, Pallas, pallet, passage, passes, patches, planet, rabbit, rashness, saddest, savage, scratches, status, tablet, vastness
3 Syllables: SUU
3 Syllables: USU
analysed, Damascus, disastrous, elaborate, Erasmus, inhabit, Johannes, molasses, paralysed, Parnassus
4 Syllables: UUSU
Found 82 words across 4 groupings. Skipped 13 excess words of a similar stem.