2 Syllables: SU
cruelties, cruelty, jewellery, jewelry
3 Syllables: SUU
brutally, functionally, gloomily, jubilee, nationally, rationally, ruefully, truthfully, usefully, usually
4 Syllables: SUUU
criminally, humorously, ludicrously, marginally, nominally, personally
4 Syllables: USUU
conditionally, exceptionally, originally, proportionally, provisionally, traditionally, unusually
5 Syllables: USUUU
Additionally, conventionally, diagonally, gratuitously, intentionally, occasionally, professionally
5 Syllables: UUSUU
educationally, unconditionally, unintentionally
6 Syllables: UUSUUU
constitutionally, longitudinally

Found 39 words across 7 groupings.