2 Syllables: SU
Burgess, Church's, circuit, circus, courteous, Curtis, earliest, Ernest, firmest, firmness, furnace, furthest, hermit, kerchief, nervous, nurses, Perseus, purchase, purpose, service, spurious, sternest, sternness, surface, surfeit, surges, surplus, target, turnip, urges, versus, worship, worshipped, worships, worthiest, worthless
3 Syllables: USU
alertness, encourage, illustrious, impervious, industrious, interpret, luxurious, reverses, traverses
4 Syllables: UUSU
Found 46 words across 3 groupings. Skipped 7 excess words of a similar stem.