2 Syllables: SU
Brougham, Cuban, dukedom, fluent, Freudian, fusion, gruesome, Houston, human, Julian, loosen, Lucan, Lucian, lumen, movement, Museum, Neumann, Newman, Newton, Newton's, nuisance, nutrient, proven, prudence, prudent, Reuben, Rubens, ruin, student, Susan, truant, Truman, union, unum
3 Syllables: USU
ablutions, acumen, albumen, albumin, allusion, amusement, collusion, communion, conclusion, confusion, delusion, diffusion, dilution, disputants, disunion, effusion, exclusion, illumined, illusion, improvement, imprudence, imprudent, inclusion, inducement, infusion, inhuman, intrusion, Methuen, occlusion, Peruvian, pollution, profusion, pursuance, pursuant, recruitment, reunion, seclusion, solution, transfusion, translucent
4 Syllables: UUSU
absolution, attribution, constitution, contribution, devolution, diminution, disillusion, dissolution, distribution, elocution, evolution, execution, institution, involution, jurisprudence, persecution, prosecution, prostitution, resolution, restitution, retribution, revolution, substitution, superhuman
5 Syllables: UUUSU
Found 102 words across 4 groupings. Skipped 34 excess words of a similar stem.