Or search: numerate, attainment, innumerate, acquisition, acquirement, accomplishment
3 Syllables: SUU
piracy, usually
4 Syllables: SUUU
accuracy, humorously, literacy, ludicrously
4 Syllables: USUU
confederacy
5 Syllables: USUUU
degeneracy, gratuitously, illiteracy, inaccuracy
6 Syllables: UUSUUU
constitutionally, longitudinally

Found 13 words across 5 groupings.