3 Syllables: SUU
favorably, miserably, preferably, separately
4 Syllables: SUUU
admirably, dexterously, excellently, favourably, honorably, honourably, tolerably
4 Syllables: USUU
exceptionally
5 Syllables: USUUU
affectionately, considerably, incomparably, inseparably, intolerably, unalterably, unfavorably, unfavourably

Found 20 words across 4 groupings.