Or search: substantially
3 Syllables: SUU
favorably, literally, miserably, preferably
4 Syllables: SUUU
admirably, criminally, favourably, honorably, honourably, liberally, literacy, rigorously, tolerably, vigorously
4 Syllables: USUU
conditionally, deliberately, originally, provisionally, traditionally
5 Syllables: USUUU
Additionally, episcopacy, illiteracy, incomparably, inexorably, inseparably, intolerably, legitimacy, legitimately, reciprocally, unalterably, unfavorably, unfavourably
5 Syllables: UUSUU
unconditionally, unequivocally
6 Syllables: UUSUUU
illegitimacy, indiscriminately, superficiality

Found 37 words across 6 groupings.