2 Syllables: SU
acting, adding, ashes, asking, aspirin, Atkins, average, babbling, backing, badges, baffling, baggage, banning, basking, batches, battling, blackening, blasting, bragging, cabbage, Canning, carriage, casting, catches, catching, Channing, chatting, clapping, clashes, clashing, clasping, classes, cracking, crackling, cramming, crashes, crashing, damage, damning, dashes, dashing, dragging, fanning, fastening, fasting, fattening, flagging, flapping, flashes, flashing, flattening, gases, gasping, glasses, grabbing, granting, grappling, grasping, grasses, hacking, happening, hatches, hatching, having, javelin, lacking, lagging, lapping, lashes, lashing, lasting, laughing, maddening, manage, Manning, mapping, masking, masses, massing, massive, matches, matching, matting, nagging, napkin, package, packing, padding, paddling, passage, passes, passeth, passing, passive, patches, patching, patting, planning, racking, rapids, rapine, rasping, 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, taxing, thrashing, tracking, trapping, traveling, travelling, wagging, waxing, wrapping
3 Syllables: USU
abstracting, adapting, Agassiz, amassing, attaches, attaching, attacking, attracting, collapsing, combating, combative, contrasting, despatches, despatching, detaching, dispatches, dispatching, distracting, enacting, enchanting, exacting, examine, extracting, harassing, impassive, reacting, relapsing, relaxing, subtracting, surpasses, surpassing, transacting, unchallenged, unflagging, unravelling
4 Syllables: UUSU
Found 178 words across 3 groupings. Skipped 12 excess words of a similar stem.