1 Syllable: S
2 Syllables: SU
Bergen, Bertram, Bertrand, blurring, Bourbon, burden, Burnham, burning, bursting, Burton, certain, chirping, churchman, churchmen, churning, circling, curbing, curling, currants, currents, cursing, curtain, curving, Durham, during, earldom, earning, earthen, ermine, Erwin, fervent, flirting, German, gurgling, herding, herdsmen, Herman, Hermann, hurling, hurting, irksome, Irving, Irwin, jerking, learning, lurking, merchant, merging, Merlin, Merton, nursing, Perkins, Persian, person, purging, searching, sermon, serpent, servant, serving, Sherman, skirting, spurring, sterling, Stirling, stirring, sturgeon, surgeons, surging, swirling, thirsting, turban, turning, twirling, urban, urchin, urgent, urging, urine, verdant, verging, vermin, Vernon, version, virgin, whirling, whirlwind, wording, working, workman, workman's, workmen, workmen's, worsened, worsening, yearning
3 Syllables: SUU
3 Syllables: USU
adjournment, adverting, affirming, aspersions, asserting, assertion, aversion, averting, coercion, concerning, concurrence, concurrent, concurring, conferring, confirming, conserving, convergence, convergent, converging, conversant, conversing, conversion, converting, deferring, desertion, deserving, determine, deterrent, disbursement, discerning, discernment, dispersing, dispersion, disturbance, disturbing, divergence, divergent, diverging, diversion, diverting, encircling, excursion, exerting, exertion, immersing, immersion, incurring, incursion, inferring, inserting, insertion, insurgent, inversion, inverting, luxuriant, Macpherson, manoeuvring, observance, observant, observing, occurrence, occurring, perversion, perverting, preferring, preserving, recurrence, recurrent, recurring, referring, rehearsing, reserving, resurgence, returning, reversing, reversion, reverting, subservience, subservient, suburban, subversion, transference, transferring, traversing, uncertain, unswerving, usurping
4 Syllables: UUSU
disconcerting, inadvertence, inadvertent, overburdened, predetermined, reimbursement, undeserving, undetermined
5 Syllables: UUUSU
Found 196 words across 6 groupings. Skipped 38 excess words of a similar stem.