Or search: therapsida
3 Syllables: SUU
Boniface, cooperate, dominate, moderate, nominate, operate, oscillate, propagate, tolerate, waterway
4 Syllables: USUU
accommodate, corroborate, denominate, exonerate, inaugurate, predominate

Found 16 words across 2 groupings. Skipped 8 excess words of a similar stem.