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3 Syllables: SUU
literally, miserably
4 Syllables: SUUU
barbarously, criminally, dangerously, dexterously, generously, humorously, liberally, literacy, picturesquely, rigorously, treacherously
4 Syllables: USUU
conditionally, deliberately, originally, provisionally, traditionally
5 Syllables: USUUU
Additionally, considerably, episcopacy, illiteracy, legitimacy, legitimately, reciprocally
5 Syllables: UUSUU
unconditionally, unequivocally
6 Syllables: UUSUUU
illegitimacy, indiscriminately, superficiality

Found 30 words across 6 groupings.