1 Syllable: S
adds, ads, aft, anne's, ash, ask, asp, ass, ast, badge, bags, bands, bangs, bask, basque, bass, bast, batch, bath, beds, begs, bends, bess, best, beth, blast, blends, bless, blest, brands, bras, breadth, breast, breath, brest, cabs, cache, calf, cans, cas, cash, cask, cass, cast, caste, casts, catch, cess, chaff, chef, chess, chest, chez, clams, clans, clash, clasp, class, cleanse, cleft, crabs, craft, crags, crash, crass, crest, cus, dams, dans, das, dash, deaf, death, deft, dens, depth, des, desk, draft, drags, draught, dreads, dregs, dress, edge, eft, eggs, ends, ers, ess, esse, etched, fads, fangs, fans, fast, fens, fetch, flags, flange, flash, flask, fledged, flesh, franz, fresh, friends, gangs, gas, gash, gasp, gems, gens, glands, glass, graf, graft, grams, grands, graph, grasp, grass, guess, guest, half, halved, halves, hams, hands, hangs, hans, has, hash, hast, hatch, hath, have, heads, hedge, heft, hens, hess, hesse, ins, jams, jas, jazz, jeff, jest, lads, lags, lambs, lands, las, lash, lass, last, latch, lath, laugh, ledge, left, legs, lends, length, lens, les, lest, lev, maj, mans, mash, mask, mass, masse, mast, match, math, mens, mesh, mess, nash, nes, nest, nth, pads, pangs, pans, pass, past, patch, path, pegs, pens, pest, plans, pledge, pres, presse, ques, quest, raft, rags, rams, ras, rash, reds, ref, reft, rest, rev, saith, sands, sans, sash, says, scans, scratch, sends, sens, sess, seth, shaft, shams, sheds, shreds, sketch, slabs, slash, sledge, smash, snatch, spans, spends, splash, spreads, stabs, staff, stags, stands, stems, strands, strength, stress, stretch, taft, tags, task, tends, tens, tenth, test, thames, thatch, theft, thrash, threads, tramps, trans, trash, treads, trends, tres, vans, vas, vast, vest, webs, wedge, west, west's, wrath, wrest, wretch, yes, zest
2 Syllables: SU
2 Syllables: US
3 Syllables: UUS
4 Syllables: UUUS

Found 402 words across 5 groupings. Skipped 128 excess words of a similar stem.