Or search: undo, splay, deform, unveil, blossom, stretch, uncross, exfoliate
2 Syllables: SU
boasted, bolted, coated, floated, folded, loaded, molded, noted, opiate, poet, roasted, Roebuck, scolded, Soviet, voted
3 Syllables: USU
associate, denoted, devoted, emboldened, eroded, exploded, outmoded, Potomac, promoted, revolted, unloaded

Found 26 words across 2 groupings. Skipped 3 excess words of a similar stem.