2 Syllables: SU
Brutus, Buddhist, coolest, crudest, eunuch, Eustace, fewest, fluid, fruitless, humid, Judas, looseness, looted, Lucas, Lucius, lupus, mucous, mucus, newest, newness, rooted, rudest, Rufus, soonest, stupid, suited, unit, useless
3 Syllables: USU
alluded, computed, concluded, Confucius, diluted, disputed, excluded, included, intruded, obtruded, polluted, protruded, reputed, saluted
4 Syllables: UUSU
Found 43 words across 3 groupings. Skipped 4 excess words of a similar stem.