2 Syllables: SU
adding, ashes, asking, aspirin, average, babbling, backing, badges, baffling, baggage, banning, basking, batches, battling, blasting, bragging, cabbage, Canning, carriage, casting, catches, catching, Catharine, Catherine, Channing, chatting, clapping, clashes, clashing, clasping, classes, cracking, crackling, cramming, crashes, crashing, damage, damning, dashes, dashing, dazzling, drafting, dragging, fanning, fastening, fasting, flagging, flapping, flashes, flashing, gases, gasping, glasses, grabbing, grafting, granting, grappling, grasping, grasses, hacking, hatches, hatching, having, jasmine, javelin, Katharine, Katherine, lacking, lagging, lapping, lashes, lashing, lasting, laughing, manage, Manning, mapping, masking, masses, massing, massive, matches, matching, matting, nagging, package, packing, padding, paddling, passage, passes, passeth, passing, passive, patches, patching, patting, planning, racking, rapids, rapine, rasping, rationing, rattling, ravage, sacking, sagging, sapling, sashes, savage, scanning, scratches, scratching, slamming, slapping, slashing, smashing, snapping, snatches, snatching, spanning, splashes, splashing, stabbing, staffing, straggling, strapping, tacking, tackling, tanning, tapping, thrashing, tracking, trapping, traveling, travelling, wagging, wrapping
3 Syllables: USU
Agassiz, amassing, attaches, attaching, attacking, combating, combative, contrasting, despatches, despatching, detaching, dispatches, dispatching, enchanting, examine, harassing, impassive, surpasses, surpassing, unchallenged, unflagging, unravelling
4 Syllables: UUSU
Found 162 words across 3 groupings. Skipped 10 excess words of a similar stem.