2 Syllables: SU
blurring, blushes, blushing, brushes, brushing, bubbling, budding, buses, bustling, buzzing, chuckling, clutches, clutching, cometh, coming, coupling, courage, coverage, covering, crushes, crushing, crutches, Cummings, cunning, cutting, doubling, drumming, Dublin, ducking, during, dusting, flooding, flushing, grudging, gushing, hovering, hugging, humming, judges, judging, juggling, Justin, jutting, loveth, loving, luggage, Muslim, nothing, plucking, plugging, plumbing, puffing, putting, puzzling, rubbing, running, rushes, rushing, Ruskin, rusting, rustling, scrubbing, shoving, shrugging, shuffling, shunning, shutting, smuggling, spurring, stirring, struggling, strutting, stuffing, stunning, sucking, suckling, suffering, suffrage, summing, thrusting, tonnage, touches, touching, troubling, trudging, trusting, tugging
3 Syllables: USU
adjusting, becoming, concurring, conferring, deferring, discourage, discusses, discussing, disgusting, encourage, entrusting, forthcoming, incurring, inferring, occurring, preferring, recurring, referring, succumbing, transferring
4 Syllables: UUSU
Found 108 words across 3 groupings. Skipped 9 excess words of a similar stem.