Or search: carper, critic
2 Syllables: SU
fiddler, listener, prisoner
3 Syllables: SUU
Christopher, minister, similar, titular, vinegar, Whitaker
4 Syllables: USUU
auricular, Commissioner, conspirator, deliverer, dissimilar, inquisitor, parishioners, particular, perimeter, petitioner, practitioner, solicitor
5 Syllables: UUSUU
perpendicular

Found 22 words across 4 groupings. Skipped 12 excess words of a similar stem.