1 Syllable: S
Berg, Bern, Berne, Bert, berth, birch, bird, birth, blur, blurred, bur, burg, Burke, Burke's, burn, burnt, Burr, burst, Burt, buyer, choir, church, churn, clerk, crier, cur, curb, curl, current, curs, curse, curt, curve, dearth, der, dire, dirge, dirt, drier, durch, durst, Dyer, Earl, Earle, Earls, earn, earth, er, Ernst, ers, fer, fern, fir, fire, firm, firs, first, Firth, fleur, flirt, for, freer, friar, fur, germ, gird, girl, girt, girth, heard, hearse, her, herb, herd, hers, hier, higher, hire, Hirsch, hurl, Hurst, hurt, ire, iron, jerk, jours, Ker, Kern, Kerr, Kirk, Kurt, learn, learnt, liar, lurch, lurk, lyre, mer, merge, Meyer, mire, mirth, Myers, myrrh, nerve, nurse, oeuvre, pearl, per, perch, Pere, pers, pert, Perth, prior, pur, purge, purse, pyre, quire, scourge, search, serf, serge, serv, serve, shire, shirk, shirt, Sir, sire, Sirs, skirt, slur, sperm, spire, spur, spurn, spurred, spurs, spurt, squire, stern, Sterne, stir, stirred, stirs, sur, sure, surf, surge, swerve, swirl, ter, term, tern, terse, third, thirst, tire, tors, turf, Turk, turn, Tyre, urge, urn, ver, verb, verge, vers, verse, vert, were, wert, whirl, wire, word, work, world, worm, worse, worst, worth, yearn, yer, yours
2 Syllables: SU
adverse, beaver, Beecher, binder, breeder, briefer, brighter, Caesar, cedar, Cesar, chauffeur, cheaper, childbirth, cider, cipher, cleaner, clearer, climber, concert, converse, convert, creature, creeper, dealer, dearer, deeper, desert, diver, dreamer, driver, eager, easier, Easter, Eastern, eastward, eater, either, emerge, ether, excerpt, feature, feebler, feeder, fever, fiber, fibre, fighter, finder, finer, greener, grinder, healer, hearer, heater, heifer, hyper, iceberg, idler, insert, Kaiser, keener, keeper, kinder, leader, leeward, leisure, lever, Liber, libre, lighter, liner, liter, livelier, livre, meager, meagre, meaner, meteor, meter, metre, mightier, milder, miner, minor, mirror, miser, mitre, nearer, neither, nicer, Niger, overt, pervert, Peter, Piper, pleader, preacher, primer, reader, reaper, research, rider, rigour, riper, Schneider, Schuyler, seaward, seeker, seizure, senior, Signer, sleeper, slighter, Snyder, speaker, spider, steamer, steeper, Steiner, streamers, strikers, sweeter, teacher, Tiber, tiger, tighter, timer, transfer, transferred, transfers, traverse, Tyler, viper, weaker, weaver, Wheeler, whiter, wider, Wiener, wilder, wiser, writer
2 Syllables: US
absurd, acquire, adjourn, admire, affirm, afire, alert, amours, aspire, assert, attire, averred, averse, avert, coerce, concern, concur, concurred, concurs, confer, conferred, confers, confirm, conserve, conspire, converge, conversed, defer, deferred, demur, demurred, deserve, desire, dessert, deter, deterred, disbursed, discern, discoursed, disperse, disturb, diverge, diverse, divert, enquire, entire, exert, expire, immerse, incur, incurred, incurs, inert, infer, inferred, infers, infirm, inquire, inspire, inter, interred, inverse, invert, manoeuvres, Messieurs, Monsieur, observe, obverse, occur, occurred, occurs, perturbed, perverse, prefer, preferred, prefers, preserve, reaffirm, reassert, rebirth, recherche, recur, recurred, recurs, refer, referred, refers, rehearse, require, researched, reserve, retire, return, reverse, revert, sojourned, submerged, subvert, superb, supplier, transpired, transverse, twothirds, unearned, unearthed, unfurled, unheard, unhurt, unnerved, usurp, vespers, Wentworth
3 Syllables: SUU
3 Syllables: USU
admirer, adviser, advisor, beleaguered, believer, besiegers, compiler, deceiver, decipher, demeanor, demeanour, designer, diviner, Enquirer, inquirer, northeastern, outsider, procedure, provider, receiver, Redeemer, reminder, saltpetre, southeastern, subscriber, survivor
3 Syllables: UUS
connoisseur, interspersed, overheard, overseer, overwork, privateer, reimburse, unconcern, undeserved, undisturbed, uninspired
4 Syllables: UUSU
4 Syllables: UUUS
Found 488 words across 8 groupings. Skipped 246 excess words of a similar stem.