2 Syllables: SU
amis, anguish, ashes, average, badges, baggage, bandage, banish, batches, branches, brandished, cabbage, carriage, castings, catches, chances, clashes, classes, crashes, damage, dampness, dances, dashes, famished, fastenings, flashes, Frances, Francis, gases, glances, glasses, grasses, hangings, hatches, Lambeth, lances, landings, language, languish, lashes, manage, masses, massive, matches, package, passage, passes, passeth, passive, patches, rapids, ravage, Sandwich, saplings, sashes, savage, scratches, snatches, Spanish, splashes, stances, standeth, trappings, vanish, vanquish, vantage
3 Syllables: SUU
3 Syllables: USU
advances, advantage, Agassiz, attaches, combative, despatches, dispatches, enhances, expanses, expansive, impassive, outlandish, romances, surpasses, unchallenged
4 Syllables: UUSU
5 Syllables: UUUSU
Found 86 words across 5 groupings. Skipped 11 excess words of a similar stem.