3 Syllables: SUU
beautiful, crucible, funeral, humankind, Juvenal, movable, moveable, mutable, numeral, scrutinize, suitable, tubercle, usable, usual
4 Syllables: USUU
deducible, excusable, immovable, immoveable, immutable, inscrutable, reducible, removable, renewable, unsuitable
5 Syllables: UUSUU
constitutional, indisputable, inexcusable, institutional, irreducible, irrefutable, longitudinal, revolutionize
6 Syllables: UUUSUU
Found 33 words across 4 groupings. Skipped 4 excess words of a similar stem.