2 Syllables: SU
blurring, blushing, brushing, bubbling, budding, burning, bursting, bustling, buzzing, chirping, chuckling, churning, circling, clutching, coming, coupling, covering, crushing, Cummings, cunning, curbing, curling, cursing, curving, cutting, doubling, drumming, Dublin, ducking, during, dusting, earning, Erwin, flirting, flooding, flushing, grudging, gurgling, gushing, herding, herdsmen, hovering, hugging, humming, hurling, hurting, Irving, Irwin, jerking, judging, juggling, Justin, jutting, learning, loving, lurking, merging, Merlin, nothing, nursing, Perkins, plucking, plugging, plumbing, puffing, purging, putting, rubbing, running, rushing, Ruskin, rusting, rustling, scrubbing, searching, serving, shoving, shrugging, shuffling, shunning, shutting, skirting, smuggling, spurring, sterling, Stirling, stirring, struggling, strutting, stuffing, stunning, sturgeon, sucking, suckling, suffering, summing, surgeon, surging, swirling, thirsting, thrusting, touching, troubling, trudging, trusting, tugging, turning, twirling, urging, verging, vermin, virgin, whirling, whirlwind, wording, working, workmen, worsening, yearning
3 Syllables: SUU
3 Syllables: USU
adjusting, adverting, affirming, asserting, averting, becoming, concerning, concurring, conferring, confirming, conserving, converging, conversing, converting, deferring, deserving, discerning, discussing, disgusting, dispersing, disturbing, diverging, diverting, encircling, entrusting, exerting, forthcoming, immersing, incurring, inferring, inserting, inverting, manoeuvring, observing, occurring, perverting, preferring, preserving, recurring, referring, rehearsing, reserving, returning, reversing, reverting, succumbing, transferring, traversing, unswerving, usurping
4 Syllables: UUSU
Found 175 words across 4 groupings. Skipped 10 excess words of a similar stem.