Or search: testily, pettishly, petulantly
3 Syllables: SUU
literally, miserably
4 Syllables: SUUU
creditably, criminally, hospitably, liberally, literacy, profitably, reasonably, rigorously, vigorously
4 Syllables: USUU
conditionally, deliberately, originally, provisionally, traditionally
5 Syllables: USUUU
Additionally, considerably, episcopacy, illiteracy, inevitably, legitimacy, legitimately, reciprocally, unreasonably
5 Syllables: UUSUU
unconditionally, unequivocally
6 Syllables: UUSUUU
illegitimacy, indiscriminately, superficiality

Found 30 words across 6 groupings.