1 Syllable: S
aft, as, ash, ask, asp, ass, ast, badge, bask, Basque, bass, bast, batch, bath, blast, bras, cache, calf, cas, cash, cask, Cass, cast, caste, casts, catch, chaff, clash, clasp, class, craft, crash, crass, Das, dash, draft, draught, fast, flash, flask, gas, gash, gasp, glass, Graf, graft, graph, grasp, grass, half, halved, halves, has, hash, hast, hatch, hath, have, Jas, jazz, lash, lass, last, latch, lath, laugh, Maj, mash, mask, mass, masse, mast, match, math, Nash, pass, past, patch, path, raft, ras, rash, sash, scratch, shaft, slash, smash, snatch, splash, staff, Taft, task, thatch, thrash, trash, vas, vast, wrath
2 Syllables: SU
2 Syllables: US
abashed, aghast, alas, Alsace, amass, attach, behalf, despatch, detached, dispatch, harass, recast, repast, surpass, unmasked, unmatched, whereas
3 Syllables: UUS
Found 124 words across 4 groupings. Skipped 58 excess words of a similar stem.