1 Syllable: S
Ian, leant
2 Syllables: SU
beacon, beaten, chieftain, clearance, Cleveland, credence, deacon, decent, deepen, deference, demon, deviant, Eastman, Easton, eaten, Eaton, Eden, Ephraim, Eton, ference, Freedman, freedmen, freedom, Freeman, Freeman's, frequent, Friedman, Grecian, Greenland, grievance, heathen, helium, legion, Leland, lenient, lesion, median, medium, Museum, Pekin, piquant, preference, premium, prescience, reagent, reason, recent, reference, refund, Regent, region, Reverend, seaman, seamen, season, semen, sequence, serum, Stephen, Steven, Sweden, sweeten, tedium, theorem, treason, treatment, veteran, weaken, Zealand
2 Syllables: US
3 Syllables: SUU
arrogance, arrogant, decadence, decadent, denizens, detriment, elegance, elegant, element, elephant, eloquence, eloquent, emigrant, eminence, eminent, Evelyn, evidence, evident, feminine, gelatin, Lebanon, Maryland, medicine, negligence, negligent, paraffin, Pelican, pestilence, pestilent, petulance, petulant, precedence, precedents, prevalence, prevalent, redolent, regimen, regiment, relevance, relevant, resonance, resonant, reverence, reverent, Saracens, sediment, sentiment, severance, skeleton, specimen, tenement, Testament, vehemence, vehement, venison, Xenophon
3 Syllables: USU
accretion, achievement, adherence, adherent, adhesion, agreement, allegiance, appearance, Archdeacon, Armenian, Athenian, bereavement, Bohemian, Cartesian, chameleon, coherence, coherent, cohesion, comedian, completion, concealment, convenience, convenient, depletion, Ephesians, excretion, expedient, impeachment, indecent, infrequent, ingredient, magnesium, Norwegian, obedience, obedient, Phoenician, policeman, reappearance, secretion, uneven, unfrequent, Venetian
3 Syllables: UUS
4 Syllables: USUU
beneficence, benevolence, benevolent, comparison, embarrassment, experiment, impediment, inheritance, intelligence, intelligent, irrelevant, irreverence, irreverent, malevolence, malevolent, preeminence, preeminent
4 Syllables: UUSU
antecedents, disagreement, disappearance, disobedience, disobedient, epithelium, incoherence, incoherent, inconvenience, inconvenient, inexpedient, interference, paroxysms, perseverance
4 Syllables: UUUS
5 Syllables: UUUSU
Found 212 words across 10 groupings. Skipped 61 excess words of a similar stem.