1 Syllable: S
acts, aft, as, ash, ask, asp, ass, ast, auch, ax, axe, backs, badge, bask, Basque, bass, bast, batch, bath, bats, blacks, blast, blocks, blots, Bos, box, brass, broth, cache, calf, caps, cars, cas, cash, cask, Cass, cast, caste, casts, catch, cats, cause, chaff, chaps, Chas, chops, clash, clasp, class, Claus, clause, claws, clocks, cloth, cocks, cops, copse, cos, cost, cough, Cox, cracks, craft, crash, crass, Croft, crops, cross, Das, dash, docks, docs, dodge, dos, dost, doth, dots, draft, draught, draws, drops, dross, facts, fast, fats, fax, flaps, flash, flask, flats, flaws, flax, flocks, Fox, frocks, frost, froth, gaps, gas, gash, gasp, gauze, glass, gloss, gnats, Goths, Gough, Graf, graft, graph, grasp, grass, Grosse, half, halved, halves, haps, has, hash, hast, hatch, hath, hats, have, hawks, Hodge, hops, jacks, Jas, jaws, jazz, Katz, knocks, Knopf, knots, Knox, Koch, lacks, laps, lapse, las, lash, lass, last, latch, lath, laugh, laws, lax, locks, lodge, loft, Los, lost, loth, lots, Maj, maps, mas, mash, mask, masque, mass, masse, mast, match, math, mats, mav, Max, mocks, mos, mosque, moss, moth, mots, Nash, notch, nots, off, oft, ox, oz, packs, pas, passed, past, patch, path, pause, paws, Pax, plaques, plots, pots, pox, Prof, props, quacks, racks, raft, Raj, ras, rash, rats, rocks, Ross, Roth, Sachs, sacks, sacs, salve, sash, sauce, saws, Saxe, scoff, Scotch, Scots, Scott's, scraps, scratch, shaft, Shaw's, shocks, shops, shots, slash, Slav, slots, smacks, smash, snaps, snatch, socks, soft, splash, spots, squash, stacks, staff, stalks, stocks, stops, straps, straws, suave, swathed, tacks, Taft, talks, taps, task, tax, thatch, that's, thoughts, thrash, tops, toss, tracks, tracts, traps, trash, troth, trough, vas, vase, vast, vats, vos, vox, waft, walks, was, wash, wasp, wast, watch, Watts, wax, wraps, wrath, wroth, yachts
2 Syllables: SU
2 Syllables: US
3 Syllables: UUS

Found 350 words across 4 groupings. Skipped 95 excess words of a similar stem.