Or search: rhetorical
3 Syllables: SUU
cortical, forcible, horrible, notable, oracle, orbital, portable, Portugal, sociable
4 Syllables: SUUU
emotional
4 Syllables: USUU
adorable, conformable, controllable, deplorable, devotional, disposable, negotiable, promotional, unknowable
5 Syllables: UUSUU
inconsolable, insupportable, irreproachable, unapproachable, uncontrollable

Found 24 words across 4 groupings. Skipped 2 excess words of a similar stem.