2 Syllables: SU
clearance, Cyprian, deviant, fearsome, ference, Gideon, helium, idiom, ilium, lenient, Lillian, lineage, lithium, median, medium, Miriam, miscreant, myriads, Pearson, periods, premium, prescience, Scythian, serum, Simeon, Syrian, tedium, theorem, Vivian
3 Syllables: SUU
3 Syllables: USU
adherence, adherent, appearance, Armenian, Assyrian, Athenian, Bohemian, chameleon, coherence, coherent, comedian, criterion, Darwinian, delirium, Elysium, expedient, experience, imperium, incipient, ingredient, Justinian, Macpherson, magnesium, meridian, obedience, obedient, oblivion, Parisians, reappearance, recipient, resilience, Shakespearean, Siberian, Sicilian
3 Syllables: UUS
4 Syllables: UUSU
disappearance, disobedience, disobedient, epithelium, equilibrium, Hanoverian, incoherence, incoherent, inexpedient, inexperience, interference, Maximilian, perseverance, Presbyterian
5 Syllables: UUUSU
Found 80 words across 6 groupings. Skipped 17 excess words of a similar stem.