Or search: curb, hush, burke, quell, seize, usurp, quench, subdue, capture, squelch, suppress
2 Syllables: SU
bombers, calmer, Chalmers, commerce, concert, concord, conjure, Connor, conquered, conquers, converse, convert, donner, fonder, honor, Honore, honors, honour, longer, longterm, monster, onward, Palmer, ponder, Saunders, sauntered, somber, sombre, sponsor, squander, stronger, wander, yonder
3 Syllables: USU
dishonor, dishonour
4 Syllables: UUSU
Alexandre

Found 36 words across 3 groupings. Skipped 16 excess words of a similar stem.