1 Syllable: S
auf, aus, blouse, boughs, bound, bouse, bowed, bows, brows, browse, cloud, couch, cowed, cows, crouch, crowd, crowned, drowned, Faust, found, frowned, ground, grouse, hound, house, How's, loud, lounged, louse, mound, mouse, mouth, oust, ploughed, ploughs, plowed, plows, pouch, pound, proud, round, rouse, shroud, sound, South, sowed, spouse, Strauss, vouch, vowed, vows, wound
2 Syllables: SU
2 Syllables: US
abound, aground, allowed, allows, aloud, around, arouse, avowed, confound, endowed, endows, espouse, expound, Macleod, profound, propound, rebound, redound, renowned, resound, surround, unbound, unsound
3 Syllables: UUS
Found 78 words across 4 groupings. Skipped 26 excess words of a similar stem.