3 Syllables: SUU
desperately, generally, preferably, separately
4 Syllables: SUUU
celibacy, creditably, definitely, delicacy, delicately, Fortunately, generously, infinitely, obstinately, passionately, perilously, sedulously, treacherously
4 Syllables: USUU
confederacy
5 Syllables: USUUU
affectionately, degeneracy, dispassionately, effeminacy, incredulously, inevitably, inordinately, inseparably, intelligibly, professionally, proportionately, unfortunately, unquestionably
5 Syllables: UUSUU
irrevocably
6 Syllables: UUSUUU
disproportionately, indiscriminately

Found 34 words across 6 groupings.