2 Syllables: SU
airing, Baring, bearing, bedding, begging, bending, Benson, Bentham, Benton, betting, blending, blessing, Bremen, caring, Charing, checking, cleansing, Clemens, Clement, daring, denning, destined, dreading, dredging, drenching, dressing, dwelling, ebbing, edging, Edwin, emblem, ending, engine, ensign, entrance, erring, etching, felling, fencing, Fenton, fetching, flaring, Fleming, fretting, getting, glaring, guessing, heading, Helen's, herring, Jenkins, Jennings, Jensen, jesting, Kenyon, larynx, lemon, lending, lengthen, Lenin, Lessing, letting, leveling, Levin, meddling, mending, mention, nesting, nestling, netting, pairing, paring, pecking, penance, penchant, pendant, pendent, pending, Penguin, pennant, pension, pharynx, pledging, Plenum, pressing, quenching, Quentin, reading, remnant, rending, renting, resin, resting, selling, semblance, sending, sensing, sentence, sentient, setting, settling, sharing, shedding, shelling, sketching, smelling, sparing, spelling, spending, spreading, squaring, staring, stemming, stepping, strengthen, stressing, stretching, swearing, sweating, swelling, tearing, telling, temperance, tempting, tenant, tending, tendon, tension, testing, threading, threshing, treading, trembling, trenchant, Trenton, vengeance, venom, venting, vesting, wearing, wedding, welling, wetting, wrecking, wrenching, wresting, wrestling, yelling
3 Syllables: SUU
3 Syllables: USU
abetting, abstention, addressing, alleging, amending, amendment, arresting, ascendant, ascending, ascension, assembling, assenting, assessing, attempting, attendance, attendant, attending, attention, attesting, avenging, begetting, besetting, caressing, cementing, clandestine, commencement, commencing, commending, comparing, compelling, compendium, compressing, condemning, condensing, confessing, consenting, contending, contenting, contention, contentment, contesting, convention, declaring, declension, defendant, defending, dependant, dependence, dependent, depending, depressing, descendant, descending, despairing, detention, dimension, dispelling, dispensing, dissension, dissenting, distressing, endeavoring, entrenchments, excelling, exempting, exemption, expelling, expending, expressing, extending, extension, fermenting, forbearing, foretelling, forgetting, impairing, impelling, impending, impressing, indwelling, intending, intention, inventing, invention, investing, lamenting, Lieutenant, millennium, momentum, offending, oppressing, possessing, preparing, presenting, presentment, pretending, pretension, preventing, prevention, professing, progressing, propelling, rebelling, redemption, refreshing, regretting, remembering, remembrance, repairing, repelling, repentance, repentant, repenting, repressing, requesting, resemblance, resembling, resenting, resentment, resplendent, retention, retrenchment, suggesting, suppressing, suspending, suspension, transcendence, transcendent, transcending, transgressing, unbending, undressing, unending, unerring, unsettling, unsparing, upsetting
4 Syllables: UUSU
apprehending, apprehension, comprehending, comprehension, condescending, condescension, contravention, hypertension, inattention, independence, independent, intervention, overbearing, prepossessing, recommending, referendum, representing, supplementing, unoffending, unrelenting
5 Syllables: UUUSU
Found 314 words across 5 groupings. Skipped 53 excess words of a similar stem.