1 Syllable: S
all, All's, alms, alt, aud, aught, Auld, awed, awl, Bach, bald, balked, ball, balm, baud, bloc, block, blot, Bob, bobbed, Bock, bod, bog, bogged, bogs, bot, bought, box, brawl, broad, Brock, brought, call, calm, Carl, caught, chalk, Charles, chop, chopped, chops, Claude, clock, clod, clog, clogged, clogs, clot, cob, Cobb, cock, Cod, cog, Col, Coll, cop, copse, cost, cot, coughed, Cox, crawl, Croft, crop, cropped, crops, crossed, daubed, Doc, dock, docs, Dodd, dog, dogged, dogs, doll, dost, dot, drop, dropped, drops, dropt, fall, false, fault, flawed, flock, flogged, flop, FOB, fog, fop, fought, Fox, fraud, fraught, frock, frog, frost, gall, Gaul, gnarled, gnawed, God, golf, got, Gott, grog, Hall, halt, haul, haut, hawk, hob, Hobbes, hoc, hock, hod, hog, Hogg, hogs, hop, hopped, hops, hot, Jacques, job, jog, jot, Karl, knob, knock, Knopf, knot, Knox, lat, laud, Loch, lock, Locke, locks, loft, log, lop, lopped, lost, lot, Mall, malt, marl, masque, Maud, mob, mock, mod, mol, Moll, mop, mosque, mots, Mott, naught, nod, not, notched, nots, nought, Oct, odd, oft, OP, opt, ought, ox, pall, palm, Paul, Paul's, plot, pod, Pol, pop, popped, pot, Pott, pox, Prague, prob, Proc, prod, prop, propped, props, Psalm, qualms, quod, rob, robbed, robs, rock, rod, rot, salt, Saul, sawed, scoffed, Scot, Scott, Scott's, scrawl, shawl, shock, shod, shop, shot, slop, slot, small, smock, snarl, snob, sob, sobbed, sobs, sock, sod, soft, sol, solve, sop, sot, sought, spot, sprawled, squad, squall, squat, stalk, stall, stock, stop, stopped, stops, tal, talk, tall, taught, taut, thawed, thought, thrall, throb, throbbed, throbs, Tod, tol, top, topped, tops, tossed, tot, trod, trot, vault, vox, wad, waft, walk, wall, Walsh, Walt, waltz, washed, wasp, wast, Wat, watched, Watt, wot, wrought, yacht
2 Syllables: SU
cannot, natal, Punjab, recall
2 Syllables: US
3 Syllables: UUS
6 Syllables: UUUUSU

Found 342 words across 5 groupings. Skipped 120 excess words of a similar stem.