2 Syllables: SU
Acad, acid, Arab, arid, ballad, barrack, blackened, blasted, carrot, challenged, chatted, damaged, fashioned, fastened, fattened, flattened, gladdened, granted, Hammond, happened, lasted, maddened, managed, padded, pallid, patted, placid, planted, ragged, rapid, saddened, salad, slackened, slanted
3 Syllables: SUU
3 Syllables: USU
Found 40 words across 3 groupings. Skipped 6 excess words of a similar stem.