2 Syllables: SU
7, Aaron, Baron, barren, beckon, Bedlam, bellum, Bremen, brethren, Breton, carriage, cession, Clarence, Clemens, Clement, crescent, currant, deaden, deference, Devon, dresses, edges, Edmond, Edmund, Edwin, Ellen, Epsom, errand, errant, Essen, essence, Evan, extant, felon, freshened, harem, heaven, Helen, heron, Hessian, Karen, leaden, leaven, Leben, legend, lemon, Lenin, lessen, lesson, leverage, melon, message, methods, parent, peasant, Pelham, penance, pennant, pheasant, pleasant, Plenum, preference, pregnant, presence, present, presses, pression, Preston, question, reckon, rectum, reddened, reference, requiem, resin, Reverend, second, section, segment, septum, session, seven, sexton, Sharon, sketches, spectrum, Stephens, stresses, stretches, tenant, Terence, terras, threaten, vellum, venom, veteran, weapon, wedges, weren, Weston, wreckage
3 Syllables: SUU
11, arrogance, arrogant, betterment, carriages, compresses, decadence, decadent, denizens, detriment, dissection, Egerton, elegance, elegant, element, elephant, eleven, eloquence, eloquent, emigrant, eminence, eminent, Evelyn, evidence, evident, feminine, gelatin, heritage, inclement, Lebanon, Maryland, medicine, messages, negligence, negligent, paraffin, Pelican, pestilence, pestilent, petulance, petulant, precedence, precedents, premises, prevalence, prevalent, progresses, redolent, regimen, regiment, relevance, relevant, resonance, resonant, reverence, reverent, Saracens, sediment, sentiment, severance, skeleton, specimen, tenement, terraces, Testament, venison, Xenophon
3 Syllables: USU
aberrant, acceptance, accession, affection, aggression, apparent, assessment, collection, complexion, compression, conception, concession, confession, connection, connexion, contestants, convection, correction, deception, defection, deflection, dejection, depresses, depression, detection, digression, dilemmas, direction, discretion, ejection, election, erection, exception, expectant, expresses, expression, fluorescent, forbearance, impression, inception, incessant, infection, inflection, inherent, injection, inspection, intestine, investment, Lieutenant, Magellan, miscarriage, objection, obsession, oppression, percentage, perception, perfection, possesses, possession, predestined, procession, profession, progression, projection, protection, quiescence, quiescent, quintessence, reception, recession, reflection, reflexion, regression, rejection, repellent, repression, secession, selection, subjection, successes, succession, suppression, transgression, transparent, umbrellas, unpleasant
4 Syllables: USUU
beneficence, benefices, benevolence, benevolent, comparison, embarrassment, experiment, impediment, inheritance, intelligence, intelligent, irrelevant, irreverence, irreverent, malevolence, malevolent, preeminence, preeminent
4 Syllables: UUSU
acquiescence, adolescence, adolescent, antecedent, cerebellum, circumspection, convalescence, convalescent, disaffection, effervescence, evanescent, imperfection, incandescent, indiscretion, insurrection, intercession, interregnum, intersection, introspection, iridescent, Mahometan, misconception, obsolescence, omnipresence, omnipresent, phosphorescent, preconceptions, predilection, prepossessions, recollection, reelection, resurrection, retrogression
Found 305 words across 5 groupings. Skipped 98 excess words of a similar stem.