Or search: conk, exit, swim, choke, croak, expire, perish, decease, submerge, submerse, eliminate, overwhelm, extinguish
1 Syllable: S
bounce, bound, brown, Browne, browns, clown, coun, count, crown, down, drowned, found, fount, frown, gown, ground, hound, lounge, mound, Mount, noun, ounce, pounce, pound, round, sound, town, Towne, towns, wound
2 Syllables: SU
compound, discount
2 Syllables: US
abound, account, aground, amount, announce, around, confound, denounce, dismount, downtown, expound, Guillaume, profound, pronounce, propound, rebound, recount, redound, renounce, renown, resound, surmount, surround, unbound, unsound

Found 57 words across 3 groupings. Skipped 38 excess words of a similar stem.