2 Syllables: SU
7, aaron, baron, barren, beckon, bedlam, belgian, belgium, bellum, bremen, brethren, breton, cession, cheltenham, clarence, clemens, clement, crescent, currant, deaden, deference, devon, edwin, ellen, errand, errant, essen, essence, evan, felon, freshened, harem, heaven, heron, hessian, karen, leaden, leaven, leben, legend, lemon, lenin, lessen, lesson, melon, nelson, nelson's, parent, peasant, pelham, penance, pennant, pheasant, pleasant, plenum, preference, presence, present, pression, preston, question, reckon, reddened, reference, resin, reverend, second, selden, seldom, session, seven, sharon, sheldon, stephens, tenant, terence, threaten, twelvemonth, vellum, venom, veteran, weapon, welcome, weren, weston
3 Syllables: SUU
3 Syllables: USU
aberrant, accession, aggression, apparent, assessment, compression, concession, confession, contestants, depression, digression, discretion, expression, fluorescent, forbearance, impression, incessant, inherent, intestine, investment, lieutenant, magellan, obsession, oppression, possession, predestined, procession, profession, progression, quiescence, quiescent, quintessence, rebellion, recession, regression, repellent, repression, secession, succession, suppression, transgression, transparent, unpleasant, unwelcome
4 Syllables: UUSU
acquiescence, adolescence, adolescent, cerebellum, convalescence, convalescent, effervescence, evanescent, incandescent, indiscretion, intercession, iridescent, mahometan, obsolescence, omnipresence, omnipresent, phosphorescent, prepossessions, retrogression
Found 151 words across 4 groupings. Skipped 56 excess words of a similar stem.