2 Syllables: SU
blushes, brushes, burnished, buses, churches, churlish, clutches, cometh, comings, courage, coverage, crushes, crutches, Cummings, curses, Curtis, cuttings, earnest, Ernest, flourish, furnish, furtive, girlish, judges, loveth, luggage, merges, nothings, nourish, nurses, perches, purges, purplish, purses, rushes, scourges, searches, service, skirmish, stirrings, sufferings, suffrage, surfaced, surges, tonnage, touches, Turkish, urges, verses, worketh
3 Syllables: SUU
3 Syllables: USU
assertive, coercive, discouraged, discursive, discusses, encourage, researches, reverses, subversive
Found 60 words across 3 groupings. Skipped 6 excess words of a similar stem.