Or search: erbium
1 Syllable: S
as, Berg, Bern, Berne, Bert, berth, Bess, best, Beth, bets, birch, bird, birth, bless, blest, blur, blurred, breast, breath, Brest, bur, burg, Burke, Burke's, burn, burnt, Burr, burst, Burt, cess, checks, chef, cheques, chess, chest, chez, church, churn, cleft, clerk, crest, cur, curb, curl, current, curs, curse, curt, curve, cus, deaf, dearth, death, debts, decks, deft, der, des, desk, dirge, dirt, dress, durch, durst, Earl, Earle, Earls, earn, earth, edge, eft, er, Ernst, ess, esse, etched, ex, f, fer, fern, fetch, fir, firm, firs, first, Firth, fledged, flesh, fleur, flirt, for, freer, fresh, fur, germ, gets, gird, girl, girt, girth, guess, guest, heard, hearse, hedge, Heft, her, herb, herd, hers, Hess, Hesse, Hirsch, hurl, Hurst, hurt, ins, Jeff, jerk, jest, jets, jours, Ker, Kern, Kerr, Kirk, Kurt, las, learn, learnt, ledge, left, les, lest, lets, Lev, lex, lurch, lurk, mer, merge, mesh, mess, Metz, mirth, myrrh, necks, nerve, nes, nest, nets, next, nurse, oeuvre, pearl, per, perch, Pere, pers, pert, Perth, pest, pets, pledge, pres, Presse, pur, purge, purse, ques, quest, ref, reft, rest, Rev, Rex, s, saith, says, scourge, search, sects, serf, serge, serv, serve, Sess, Seth, sets, sex, shirk, shirt, Sir, sketch, skirt, sledge, slur, specks, sperm, spur, spurn, spurred, spurs, spurt, steppes, steps, stern, Sterne, stir, stirred, stirs, stress, stretch, sur, sure, surf, surge, swerve, swirl, ter, term, tern, terse, test, Tex, text, theft, third, thirst, threats, tors, tres, turf, Turk, turn, urge, urn, ver, verb, verge, vers, verse, vert, vest, vex, wedge, were, wert, West, West's, whirl, word, work, world, worm, worse, worst, worth, wrecks, wrest, wretch, X, yearn, yer, Yes, yours, zest
2 Syllables: SU
2 Syllables: US
abreast, absurd, accepts, addressed, adepts, adjourn, affects, affirm, afresh, alert, allege, amours, arrest, assert, assess, attest, averred, averse, avert, begets, behest, bequest, bereft, burlesque, cadets, caress, coerce, collects, compressed, concern, concur, concurred, concurs, confer, conferred, confers, confess, confirm, connects, conserve, converge, conversed, corrects, cortege, Cortes, defer, deferred, demur, demurred, depress, deserve, dessert, detects, deter, deterred, detest, directs, disbursed, discern, discoursed, disperse, distress, disturb, diverge, diverse, divert, divest, egress, elects, enmeshed, erects, exert, expects, express, fierceness, finesse, forgets, Francaise, grotesque, immerse, impressed, incur, incurred, incurs, inert, infer, inferred, infers, infest, infirm, inter, interred, inverse, invert, invest, Macbeth, manoeuvres, Messieurs, Midwest, molest, Monsieur, neglects, noblesse, northwest, observe, obsessed, obverse, occur, occurred, occurs, oppress, outstretched, perplex, perturbed, perverse, possess, prefer, preferred, prefers, preserve, profess, progressed, protects, reaffirm, reassert, rebirth, recherche, recur, recurred, recurs, redressed, refer, referred, refers, reflects, refresh, regrets, rehearse, repress, request, researched, reserve, respects, return, reverse, revert, selects, sojourned, southwest, submerged, subvert, success, suggest, superb, suppress, tempests, transgress, transverse, twothirds, undress, unearned, unearthed, unfurled, unheard, unhurt, unless, unnerved, unrest, usurp, vespers, vignettes, Wentworth
3 Syllables: SUU
3 Syllables: UUS
4 Syllables: UUUS

Found 502 words across 6 groupings. Skipped 189 excess words of a similar stem.