Or search: rosin
2 Syllables: SU
7, Aaron, airing, Baring, Baron, barren, bearing, beckon, bedding, Bedlam, begging, bellum, betting, beverage, blesses, blessing, Bremen, brethren, Breton, caring, carriage, cession, Charing, checking, Clarence, Clemens, Clement, crescent, currant, daring, deaden, deafening, deference, denning, destined, Devon, dreading, dredging, Dresden, dresses, dressing, dwelleth, dwelling, ebbing, edges, edging, Edwin, Ellen, errand, errant, erring, Essen, essence, etching, Evan, felling, felon, festive, fetching, flaring, Fleming, freshened, freshman, freshmen, fretting, getting, glaring, guesses, guessing, harem, heading, heaven, hedges, Helen, Helen's, heron, herring, Hessian, Jennings, jesting, Karen, Kenneth, larynx, leaden, leaven, Leben, ledges, legend, lemon, Lenin, lessen, Lessing, lesson, letting, leveling, leverage, Levin, marriage, meddling, melon, meshes, message, messes, methods, nesting, nestling, netting, pairing, parent, paring, peasant, pecking, Pelham, penance, pennant, pharynx, pheasant, pleasant, pledges, pledging, Plenum, preference, presage, presence, present, presses, pressing, pression, Preston, question, reading, reckon, reddened, reference, resin, resting, restive, Reverend, second, selling, session, setting, settling, seven, sharing, Sharon, shedding, shelling, sketches, sketching, smelling, sparing, spelling, spreading, squaring, staring, stemming, Stephens, stepping, stresses, stressing, stretches, stretching, swearing, sweating, swelling, tearing, telling, tenant, Terence, terras, testing, threading, threaten, threshing, treading, tresses, vellum, venom, vestige, vesting, veteran, weapon, wearing, wedding, wedges, welling, weren, Wesleyan, Weston, wetting, wreckage, wrecking, wresting, wrestling, wretches, yelling
3 Syllables: SUU
3 Syllables: USU
aberrant, abetting, accession, addresses, addressing, aggression, aggressive, alleges, alleging, apparent, arresting, assessing, assessment, attesting, begetting, besetting, caresses, caressing, clandestine, comparing, compelling, compressing, compression, concession, condemning, confesses, confessing, confession, congestion, consenting, contestants, contesting, declaring, depresses, depressing, depression, descendants, despairing, digestion, digestive, digression, dilemmas, discretion, disparage, dispelling, dissenting, distresses, distressing, endeavoring, equestrian, excelling, excesses, excessive, expelling, expresses, expressing, expression, expressive, fluorescent, forbearance, forbearing, foretelling, forgetting, impairing, impelling, impresses, impressing, impression, impressive, incentive, incessant, indwelling, ingestion, inherent, intestine, investing, investment, Lieutenant, Magellan, miscarriage, obsession, obsessive, oppresses, oppressing, oppression, oppressive, pedestrian, percentage, possesses, possessing, possession, possessive, predestined, preparing, preventing, preventive, procession, professes, professing, profession, progressing, progression, progressive, propelling, quiescence, quiescent, quintessence, rebelling, recession, refreshing, refreshment, regression, regressive, regretting, repairing, repellent, repelling, repressing, repression, repressive, requesting, resenting, secession, successes, succession, successive, suggesting, suggestion, suggestive, suppresses, suppressing, suppression, transgressing, transgression, transparent, umbrellas, undressing, unerring, unpleasant, unquestioned, unsettling, unsparing, upsetting
4 Syllables: UUSU

Found 371 words across 4 groupings. Skipped 67 excess words of a similar stem.