Or search: loom, brood, dwarf, hover, eclipse, prevail, overtop, overarch, overbear, overshadow, outbalance, overbalance, preponderate
3 Syllables: SUU
commonplace, compensate, concentrate, consummate, contemplate, cooperate, dominates, moderate, nominate, operate, oscillate, propagate, tolerate
4 Syllables: USUU
accommodate, corroborate, denominate, exonerate, predominate

Found 18 words across 2 groupings. Skipped 9 excess words of a similar stem.