2 Syllables: SU
beaming, beating, being, bidden, bidding, billing, bleaching, bleating, bleeding, breathing, breeding, bridging, brimming, bristling, ceasing, ceding, ceiling, cheating, cheering, chilling, chipping, christening, cleaning, clearing, cleaving, clicking, clipping, creaking, creeping, crippling, dealing, deeming, differing, digging, dipping, dreaming, drilling, dripping, earrings, easing, eating, even, fearing, feasting, feeding, feeling, filling, fishing, fitting, fleeing, fleeting, flitting, freeing, freezing, gearing, getting, Gibbons, giggling, given, giving, gleaming, gleanings, glistening, greeting, grieving, Griffin, grinning, gripping, healing, heaping, hearing, heating, heaving, heeding, Higgins, hissing, hitting, itching, jeering, keeping, kicking, killing, Kipling, kissing, kneeling, knitting, leading, leaking, leaning, leaping, leasing, leaving, licking, listening, listing, living, meaning, meeting, middling, Mifflin, milling, missing, nearing, needing, nibbling, peeling, peeping, peering, picking, piercing, pigeon, pinning, pitching, pitting, pleading, pleasing, preaching, precinct, pricking, printing, quitting, reaching, reading, realism, reaping, rearing, reeking, reeling, ridding, rigging, ripping, rippling, risking, scheming, screaming, screeching, screening, scribbling, sealing, seating, seeding, seedlings, seeing, seeking, seeming, seething, seizing, shearing, shilling, shipping, shrieking, siblings, sinning, sipping, sitting, skimming, skipping, sleeping, slipping, smiting, sneaking, sneering, sneezing, sniffing, speaking, speeding, spilling, spinning, spitting, splitting, squeaking, squeezing, stealing, steaming, steering, sticking, stitching, streaming, stripling, stripping, sweeping, swimming, switching, syringe, teaching, tearing, teasing, teeming, thieving, thinning, thrilling, ticking, tilings, tilling, tipping, treating, trickling, trimming, tripping, twisting, twitching, weaning, weaving, weeding, weekend, weeping, wheeling, whipping, whistling, willing, winning, wishing, writhing
3 Syllables: SUU
3 Syllables: USU
achieving, adhering, admitting, agreeing, appealing, appearing, appeasing, assisting, befitting, beginning, believing, beseeching, besieging, bewitching, committing, competing, completing, concealing, conceding, conceiving, consisting, convening, deceiving, defeating, dismissing, displeasing, distilling, emitting, endearing, enlisting, enriching, entreating, equipping, exceeding, existing, farreaching, fatiguing, forbidding, foreseeing, forgiving, fulfilling, impeding, increasing, insisting, instilling, intriguing, misgiving, misleading, omitting, perceiving, permitting, persisting, policemen, policing, preceding, proceeding, reappearing, receding, receiving, redeeming, releasing, relieving, remitting, repealing, repeating, resisting, retreating, retrieving, revealing, submitting, subsisting, succeeding, thanksgiving, transmitting, unceasing, unfeeling, unpleasing, unwilling, unwitting, wellbeing
4 Syllables: UUSU
disagreeing, disappearing, domineering, engineering, guaranteeing, interfering, intervening, overweening, persevering, pioneering, preexisting, superseding, unbelieving, unremitting, volunteering
5 Syllables: UUUSU
Found 310 words across 5 groupings. Skipped 25 excess words of a similar stem.