1 Syllable: S
ab, act, ad, adds, ads, aft, app, apt, ash, ask, asp, ass, ast, at, auch, aud, aught, awed, ax, axe, bach, back, bad, bag, balk, bask, basque, bass, bast, bat, batch, bats, baud, black, blast, bloc, block, blot, bob, bobbed, bock, bod, bog, bogged, bogs, bos, bot, bought, box, brag, bras, broad, brock, brought, cab, cache, cad, calf, cap, capped, caps, capt, cas, cash, cask, cass, cast, caste, casts, cat, catch, cats, caught, chaff, chalk, chap, chat, chop, chopped, chops, clad, clap, clapped, clash, clasp, class, claude, clock, clod, clog, clogged, clogs, clot, cob, cobb, cock, cod, cog, cop, copse, cos, cost, cot, cough, cox, crab, crabbed, crabs, crack, craft, crag, crash, crass, croft, crop, cropped, crops, cross, dab, dad, das, dash, dat, daubed, doc, dock, docs, dodd, dog, dogged, dogs, dos, dost, dot, drab, draft, drag, dragged, drags, draught, drop, dropped, drops, dropt, dross, fac, fact, fad, fag, fast, fat, fax, flag, flagged, flags, flap, flapped, flaps, flash, flask, flat, flawed, flax, flock, flogged, flop, fob, fog, fop, fought, fox, fraud, fraught, frock, frog, frost, gad, gag, gap, gas, gash, gasp, glad, glass, gloss, gnat, gnawed, god, got, gott, gough, grab, grabbed, graf, graft, graph, grasp, grass, grog, grosse, hack, had, hadst, hag, half, hap, hash, hast, hat, hatch, hats, haut, hawk, hob, hobbes, hoc, hock, hod, hog, hogg, hogs, hop, hopped, hops, hot, jack, jacques, jagged, jas, job, jog, jot, katz, kept, knack, knapp, knob, knock, knopf, knot, knox, koch, lab, lac, lack, lad, lag, lagged, lags, lap, lapped, laps, lapse, las, lash, lass, last, lat, latch, laud, laugh, lax, loch, lock, locke, locks, loft, log, lop, lopped, los, lost, lot, mac, mack, mad, mag, mak, map, mapped, maps, mash, mask, masque, mass, masse, mast, mat, match, mats, matt, maud, max, mob, mock, mod, mop, mos, mosque, moss, mots, mott, nad, nag, nap, nash, nat, naught, nod, not, notch, nots, nought, oct, odd, off, oft, op, opt, ought, ox, pack, pact, pad, pap, pass, past, pat, patch, pax, plaid, plaque, plat, platt, plot, pod, pop, popped, pot, pott, pox, prac, prague, pratt, prob, proc, prod, prof, prop, propped, props, quack, quod, rack, raft, rag, rap, rapped, rapt, ras, rash, rat, rob, robbed, robs, rock, rod, ross, rot, sac, sack, sacs, sad, sag, sap, sapped, sash, sat, sauce, sawed, saxe, scat, scoff, scot, scotch, scots, scott, scott's, scrap, scratch, shack, shad, shaft, shock, shod, shop, shot, slab, slack, slag, slap, slapped, slash, slop, slot, smack, smash, smock, snack, snap, snapped, snaps, snatch, snob, sob, sobbed, sobs, sock, sod, soft, sop, sot, sought, spat, splash, spot, squad, squash, squat, stab, stabbed, stabs, stack, staff, stag, stalk, stat, stock, stop, stopped, stops, strap, strapped, straps, tab, tack, tact, tad, taft, tag, tagged, tags, tak, talk, tap, tapped, taps, task, tat, taught, taut, tax, that, thatch, that's, thawed, thought, thrash, throb, throbbed, throbs, tod, top, topped, tops, toss, tot, track, tract, trap, trapped, traps, trash, trod, trot, trough, vas, vast, vat, vos, vox, wad, waft, wag, walk, wash, wasp, wast, wat, watch, watt, wax, wot, wrap, wrapped, wraps, wrapt, wrought, yacht, zag
2 Syllables: SU
2 Syllables: US
3 Syllables: UUS

Found 601 words across 4 groupings. Skipped 208 excess words of a similar stem.