3 Syllables: SUU
functionally, nationally, rationally
4 Syllables: SUUU
criminally, marginally, mercilessly, nominally, personally
4 Syllables: USUU
conditionally, determinedly, exceptionally, originally, proportionally, provisionally, traditionally
5 Syllables: USUUU
Additionally, conventionally, diagonally, intentionally, occasionally, professionally
5 Syllables: UUSUU
educationally, unconditionally, unintentionally
6 Syllables: UUSUUU
constitutionally, longitudinally

Found 26 words across 6 groupings.