3 Syllables: SUU
audible, comparable, conjugal, constable, doggerel, laudable, nautical, nominal, plausible, possible, probable, topical, volatile
4 Syllables: USUU
abdominal, apocryphal, impossible, improbable, inaudible, inaugural, methodical, phenomenal, responsible
5 Syllables: UUSUU
6 Syllables: UUUSUU
Found 26 words across 4 groupings. Skipped 1 excess word of a similar stem.