2 Syllables: SU
abbess, acid, acrid, active, added, Agnes, ashes, average, avid, axes, Bacchus, badges, baggage, Baptist, batches, blackish, blacksmith, blasted, brackish, cabbage, captive, carriage, castings, catches, chatted, clashes, classes, crashes, damage, dashes, fasted, fastenings, flaccid, flashes, gases, glasses, granted, grasses, hatches, lapses, lashes, lasted, manage, masses, massive, matches, matted, package, padded, Papists, passage, passes, passeth, passive, patches, patted, placid, planted, practice, practise, rabid, Radcliffe, rapid, ravage, saplings, sashes, satis, savage, scratches, slanted, snatches, splashes, taxes, trackless, trappings, valid, vapid, waxes
3 Syllables: USU
adaptive, Agassiz, attaches, attractive, collapses, combated, combative, despatches, dispatches, enchanted, establish, impassive, inactive, Mohammed, reactive, refractive, relapses, relaxes, surpasses, unchallenged
4 Syllables: UUSU
5 Syllables: UUUSU
Found 103 words across 4 groupings. Skipped 14 excess words of a similar stem.