Or search: hulk, loom, rear, prevail, dominant, dominate, overarch, outbalance, predominant, overbalance, preponderant, preponderate, preponderating
3 Syllables: SUU
Boniface, commonplace, compensate, concentrate, consummate, contemplate, cooperate, dominate, moderate, nominate, operate, oscillate, propagate, tolerate
4 Syllables: USUU
accommodate, corroborate, denominate, exonerate, predominate

Found 19 words across 2 groupings. Skipped 9 excess words of a similar stem.