1 Syllable: S
AB, act, ad, adds, ads, aft, App, apt, ask, asp, ast, at, aud, aught, awed, ax, axe, Bach, back, bad, bag, balk, bask, Basque, bast, bat, baud, black, blast, bloc, block, blot, Bob, bobbed, Bock, bod, bog, bogged, bogs, bot, bought, box, brag, broad, Brock, brought, cab, cad, cap, capped, caps, Capt, cask, cast, caste, casts, cat, caught, chalk, chap, chat, chop, chopped, chops, clad, clap, clapped, clashed, clasp, classed, Claude, clock, clod, clog, clogged, clogs, clot, cob, Cobb, cock, Cod, cog, cop, copse, cost, cot, coughed, Cox, crab, crabbed, crabs, crack, craft, crag, crashed, Croft, crop, cropped, crops, crossed, dab, dad, dashed, dat, daubed, Doc, dock, docs, Dodd, dog, dogged, dogs, dost, dot, drab, draft, drag, dragged, drags, draught, drop, dropped, drops, dropt, fac, fact, fad, fag, fast, fat, fax, flag, flagged, flags, flap, flapped, flaps, flashed, flask, flat, flawed, flax, flock, flogged, flop, FOB, fog, fop, fought, Fox, fraud, fraught, frock, frog, frost, Gad, gag, gap, gasp, glad, gnat, gnawed, God, got, Gott, grab, grabbed, graft, grasp, grog, hack, had, hadst, hag, hap, hast, hat, hatched, hats, haut, hawk, hob, Hobbes, hoc, hock, hod, hog, Hogg, hogs, hop, hopped, hops, hot, Jack, jagged, job, jog, jot, Katz, kept, knack, Knapp, knob, knock, Knopf, knot, Knox, lab, lac, lack, lad, lag, lagged, lags, lap, lapped, laps, lapse, lashed, last, lat, laud, laughed, lax, Loch, lock, Locke, locks, loft, log, lop, lopped, lost, lot, Mac, Mack, mad, Mag, mak, map, mapped, maps, mashed, mask, masque, massed, mast, mat, matched, mats, Matt, Maud, Max, mob, mock, mod, mop, mosque, mots, Mott, nad, nag, nap, Nat, naught, nod, not, notched, nots, nought, Oct, odd, oft, OP, opt, ought, ox, pack, pact, pad, pap, passed, past, pat, patched, Pax, plaid, plaque, plat, Platt, plot, pod, pop, popped, pot, Pott, pox, prac, Prague, Pratt, prob, Proc, prod, prop, propped, props, quack, quod, rack, raft, rag, rap, rapped, rapt, rat, rob, robbed, robs, rock, rod, rot, sac, Sachs, sack, sacs, sad, sag, sap, sapped, sat, sawed, Saxe, scat, scoffed, Scot, Scott, Scott's, scrap, scratched, shack, shad, shaft, shock, shod, shop, shot, slab, slack, slag, slap, slapped, slashed, slop, slot, smack, smashed, smock, snack, snap, snapped, snaps, snatched, snob, sob, sobbed, sobs, sock, sod, soft, sop, sot, sought, spat, splashed, spot, squad, squat, stab, stabbed, stabs, stack, staffed, 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, thatched, that's, thawed, thought, thrashed, throb, throbbed, throbs, Tod, top, topped, tops, tossed, tot, track, tract, trap, trapped, traps, trod, trot, vast, vat, vox, wad, waft, wag, walk, washed, wasp, wast, Wat, watched, Watt, wax, wot, wrap, wrapped, wraps, wrapt, wrought, yacht, zag
2 Syllables: SU
2 Syllables: US
3 Syllables: UUS

Found 538 words across 4 groupings. Skipped 167 excess words of a similar stem.