1 Syllable: S
auch, aud, aught, awed, Bach, balk, baud, bloc, block, blot, Bob, bobbed, Bock, bod, bog, bogged, bogs, Bos, bot, bought, box, bras, broad, Brock, broth, brought, cars, caught, cause, chalk, Chas, chop, chopped, chops, Claude, Claus, clause, claws, clock, clod, clog, clogged, clogs, clot, cloth, cob, Cobb, cock, Cod, cog, cop, copse, cos, cost, cot, cough, Cox, Croft, crop, cropped, crops, cross, Das, daubed, Doc, dock, docs, Dodd, dodge, dog, dogged, dogs, dos, dost, dot, doth, dots, draws, drop, dropped, drops, dropt, dross, flawed, flaws, flock, flogged, flop, FOB, fog, fop, fought, Fox, fraud, fraught, frock, frog, frost, froth, gauze, gloss, gnawed, God, got, Goths, Gott, Gough, grog, Grosse, haut, hawk, hob, Hobbes, hoc, hock, hod, Hodge, hog, Hogg, hogs, hop, hopped, hops, hot, Jacques, jaws, job, jog, jot, knob, knock, knot, Knox, Koch, las, lat, laud, laws, Loch, lock, Locke, locks, lodge, loft, log, lop, lopped, Los, lost, lot, loth, lots, mas, masque, Maud, mav, mob, mock, mod, mop, mos, mosque, moss, moth, mots, Mott, naught, nod, not, notch, nots, nought, Oct, odd, off, oft, OP, opt, ought, ox, oz, pas, pause, paws, plot, pod, pop, popped, pot, Pott, pox, Prague, prob, Proc, prod, Prof, prop, propped, props, quod, Raj, rob, robbed, robs, rock, rod, Ross, rot, Roth, salve, sauce, sawed, saws, scoff, Scot, Scotch, Scots, Scott, Scott's, Shaw's, shock, shod, shop, shot, Slav, slop, slot, smock, snob, sob, sobbed, sobs, sock, sod, soft, sop, sot, sought, spot, squad, squash, squat, stalk, stock, stop, stopped, stops, straws, suave, swathed, talk, taught, taut, thawed, thought, throb, throbbed, throbs, Tod, top, topped, tops, toss, tot, trod, trot, troth, trough, vase, vos, vox, wad, waft, walk, was, wash, wasp, wast, Wat, watch, Watt, wot, wroth, wrought, yacht
2 Syllables: SU
cannot, Punjab
2 Syllables: US
3 Syllables: UUS

Found 326 words across 4 groupings. Skipped 91 excess words of a similar stem.