2 Syllables: SU
asking, aspirin, babbling, baffling, basking, battling, blackening, blasting, casting, catching, Catharine, Catherine, clashing, clasping, crashing, dashing, dazzling, drafting, fastening, fasting, fattening, flashing, flattening, gasping, grafting, grappling, grasping, happening, hastening, hatching, having, jasmine, javelin, Katharine, Katherine, labeling, lashing, lasting, laughing, maddening, masking, massing, matching, paddling, passing, patching, rasping, rattling, scratching, slashing, smashing, snatching, splashing, staffing, straightening, tackling, thrashing, traveling, travelling
3 Syllables: SUU
annulling, battering, catering, chattering, clamoring, clamouring, clattering, fashioning, favoring, favouring, flattering, galloping, gathering, hammering, Jacobin, laboring, labouring, labyrinth, managing, mastering, neighboring, neighbouring, scattering, shattering, slackening, smattering, staggering, stammering, swaggering, tailoring, tapering, wavering
3 Syllables: USU
amassing, attaching, contrasting, despatching, detaching, disabling, dismantling, dispatching, enabling, harassing, surpassing, unravelling
4 Syllables: USUU
4 Syllables: UUSU
Found 108 words across 5 groupings. Skipped 5 excess words of a similar stem.