1 Syllable: S
4, berg, bern, berne, bert, berth, birch, bird, birth, blur, blurred, boar, boards, boars, boer, boor, bore, born, borne, bourne, bur, burg, burke, burke's, burn, burnt, burr, burst, burt, chord, chore, church, churn, clerk, coarse, cor, cords, core, cork, corn, corp, corpse, cours, course, court, cur, curb, cure, curl, current, curs, curse, curt, curve, dearth, der, dirge, dirt, door, dor, dore, drawer, durch, durst, dwarf, earl, earle, earls, earn, earth, er, ernst, ers, fer, fern, fir, firm, firs, first, firth, fleur, flirt, floor, for, forbes, force, ford, fore, forge, fork, form, forme, forms, fort, forte, forth, forts, four, fourths, freer, fur, george, germ, gird, girl, girt, girth, gore, gorge, gourd, heard, hearse, her, herb, herd, hers, hirsch, hoar, hoards, hoarse, horde, horn, hors, horse, hurl, hurst, hurt, jerk, jours, jure, ker, kern, kerr, kirk, kurt, learn, learnt, lor, lords, lore, lorn, lurch, lure, lurk, mer, merge, mirth, moor, moore, moore's, moors, mor, more, morn, morse, mort, mourn, muir, myrrh, nerve, nor, norm, norse, north, nur, nurse, oar, oeuvre, or, orb, ord, ore, org, orr, ort, pearl, per, perch, pere, pers, pert, perth, por, porch, pore, pork, port, porte, ports, pour, pur, pure, purge, purse, quart, quartz, roar, schwartz, scorched, score, scorn, scourge, search, serf, serge, serv, serve, shirk, shirt, shore, shorn, short, sir, skirt, slur, snort, soar, sor, sore, sort, source, sperm, spores, sport, spur, spurn, spurred, spurs, spurt, stern, sterne, stir, stirred, stirs, store, stork, storm, stuart, sur, sure, surf, surge, sward, swarm, swerve, swirl, sword, swore, sworn, ter, term, tern, terse, third, thirst, thor, thorn, thorpe, thwart, tor, torch, tore, torn, torre, tors, tort, tour, toward, ture, turf, turk, turn, urge, urn, ver, verb, verge, vers, verse, vert, war, wards, warm, warn, warp, wars, wart, were, wert, wharf, whirl, whore, wor, words, wore, work, world, worm, worn, worse, worst, worth, yearn, yer, yore, york, york's, your
2 Syllables: SU
2 Syllables: US
abhor, abhorred, abhors, abjure, aboard, absorb, absurd, accord, adjourn, adore, adorn, affirm, afford, afore, alert, allure, amours, ashore, assert, assure, athwart, averred, averse, avert, award, azores, before, brochure, coerce, comport, concern, concur, concurred, concurs, confer, conferred, confers, confirm, conform, conserve, consort, converge, conversed, defer, deferred, deform, demur, demure, demurred, deplore, deserve, dessert, deter, deterred, disbursed, discern, discords, discoursed, disperse, distort, disturb, diverge, diverse, divert, divorce, endorse, endure, enforce, ensure, exert, exhort, explore, extort, forbore, forewarned, forlorn, fourscore, henceforth, ignore, immerse, implore, impure, incur, incurred, incurs, indorsed, inert, infer, inferred, infers, infirm, inform, insure, inter, interred, inured, inverse, invert, lukewarm, manoeuvres, manure, mature, messieurs, monsieur, obscure, observe, obverse, occur, occurred, occurs, offshore, outdoors, outworn, pasteboard, perforce, perform, perturbed, perverse, postwar, prefer, preferred, prefers, preserve, prewar, procure, purports, rapport, reaffirm, reassert, reassure, rebirth, reborn, recherche, recur, recurred, recurs, refer, referred, refers, reform, rehearse, remorse, report, researched, reserve, resort, restore, retorts, return, reverse, revert, reward, rigours, secure, senor, sojourned, submerged, subvert, superb, support, thenceforth, therefor, transformed, transforms, transverse, twothirds, unborn, unearned, unearthed, unformed, unfurled, unheard, unhurt, unnerved, unsure, usurp, vapours, vespers, wentworth
3 Syllables: SUU
3 Syllables: UUS
4 Syllables: UUSU
4 Syllables: UUUS

Found 537 words across 7 groupings. Skipped 270 excess words of a similar stem.