2 Syllables: SU
airing, Baring, beaming, bearing, beating, bedding, begging, being, betting, bleaching, bleating, bleeding, blessing, breathing, breeding, caring, ceasing, ceding, ceiling, Charing, cheating, checking, cheering, cleaning, clearing, cleaving, creaking, creeping, daring, deadening, dealing, deeming, denning, destined, dreading, dreaming, dredging, dressing, dwelling, earrings, easing, eating, ebbing, edging, Edwin, erring, etching, even, evening, fearing, feasting, feeding, feeling, felling, fetching, Fielding, flaring, fleeing, fleeting, Fleming, freeing, freezing, fretting, gearing, getting, glaring, gleaming, gleanings, greeting, grieving, guessing, heading, healing, heaping, hearing, heating, heaving, heeding, Helen's, herring, jeering, Jennings, jesting, keeping, kneeling, larynx, leading, leaking, leaning, leaping, leasing, leaving, Lenin, Lessing, letting, leveling, Levin, meaning, meddling, meeting, nearing, needing, nesting, nestling, netting, pairing, paring, pecking, peeling, peeping, peering, pharynx, pleading, pleasing, pledging, preaching, precinct, pressing, reaching, readings, realism, reaping, rearing, reckoning, reeking, reeling, resin, resting, scheming, screaming, screeching, screening, sealing, seating, seeding, seedlings, seeing, seeking, seeming, seething, seizing, selling, setting, settling, sharing, shearing, shedding, sheepskin, shelling, shielding, shrieking, sketching, sleeping, smelling, sneaking, sneering, sneezing, sparing, speaking, speeding, spelling, spreading, squaring, squeaking, squeezing, staring, stealing, steaming, steering, stemming, stepping, streaming, stressing, stretching, swearing, sweating, sweeping, swelling, syringe, teaching, tearing, teasing, teeming, telling, testing, thieving, threading, threatening, threshing, treading, treating, vesting, vexing, weaning, wearing, weaving, wedding, weeding, weekend, weeping, welling, wetting, wheeling, wielding, wrecking, wresting, wrestling, yelling, yielding
3 Syllables: SUU
3 Syllables: USU
abetting, accepting, achieving, addressing, adhering, affecting, agreeing, alleging, annexing, appealing, appearing, appeasing, arresting, assessing, attesting, begetting, believing, beseeching, besetting, besieging, caressing, clandestine, collecting, comparing, compelling, competing, completing, compressing, concealing, conceding, conceiving, condemning, confessing, connecting, consenting, contesting, convening, correcting, deceiving, declaring, defeating, depressing, descendants, despairing, detecting, directing, direction, dispelling, displeasing, dissecting, dissenting, distressing, electing, endearing, endeavoring, entreating, erecting, exceeding, excelling, excepting, expecting, expelling, expressing, farreaching, fatiguing, forbearing, foreseeing, foretelling, forgetting, impairing, impeding, impelling, impressing, increasing, indwelling, infecting, injecting, inspecting, intriguing, investing, misleading, neglecting, objecting, oppressing, perceiving, perfecting, perplexing, policemen, policing, possessing, preceding, preparing, preventing, proceeding, professing, progressing, projecting, propelling, prospecting, protecting, reappearing, rebelling, receding, receiving, redeeming, reflecting, refreshing, regretting, rejecting, releasing, relieving, repairing, repealing, repeating, repelling, repressing, requesting, resenting, respecting, retreating, retrieving, revealing, selecting, subjecting, succeeding, suggesting, suppressing, suspecting, transgressing, unceasing, undressing, unerring, unfeeling, unpleasing, unreasoning, unsettling, unsparing, unyielding, upsetting, wellbeing
4 Syllables: UUSU
5 Syllables: UUUSU

Found 374 words across 5 groupings. Skipped 29 excess words of a similar stem.