2 Syllables: SU
bidden, bidding, billing, blinking, bridging, bringing, bristling, cheering, chilling, chipping, christening, clearing, clicking, clinging, clipping, cringing, crippling, differing, digging, dipping, drilling, drinking, dripping, dwindling, earrings, fearing, filling, fishing, fitting, flinching, flinging, flitting, gearing, getting, Gibbons, giggling, given, giving, glistening, Griffin, grinning, gripping, Higgins, hinting, hissing, hitting, imprint, inkling, instinct, itching, kicking, killing, kindling, Kipling, kissing, knitting, licking, limping, lingering, linking, listening, listing, living, middling, Mifflin, milling, mincing, mingling, missing, nearing, nibbling, picking, pigeon, pinching, pinning, pitching, pitting, pricking, printing, quitting, rearing, ridding, rigging, ringing, ripping, rippling, risking, scribbling, shearing, shilling, shipping, shrinking, siblings, singing, sinking, sinning, sipping, sitting, skimming, skipping, slipping, smiting, sneering, sniffing, spilling, spinning, spitting, splitting, springing, sprinkling, squinting, steering, sticking, stinging, stinking, stitching, stringing, stripling, stripping, swimming, swinging, switching, syringe, tearing, thinking, thinning, thrilling, ticking, tilings, tilling, tingling, tinkering, tinkling, tipping, trickling, trimming, tripping, twinkling, twisting, twitching, Vincent, whipping, whistling, willing, winking, winning, wishing, wringing, writhing
3 Syllables: USU
adhering, admitting, appearing, assisting, befitting, beginning, bewitching, committing, consisting, convincing, dismissing, distilling, emitting, enlisting, enriching, equipping, evincing, existing, forbidding, forgiving, fulfilling, impinging, infringing, insisting, instilling, misgiving, omitting, permitting, persisting, reappearing, remitting, reprinting, resisting, rethinking, submitting, subsisting, thanksgiving, transmitting, unflinching, unthinking, unwilling, unwitting
4 Syllables: UUSU
disappearing, domineering, engineering, interfering, intermingling, persevering, pioneering, preexisting, unconvincing, unremitting, volunteering
5 Syllables: UUUSU
Found 203 words across 4 groupings. Skipped 11 excess words of a similar stem.