2 Syllables: SU
bloodless, buckets, Burgess, buttocks, buttress, Church's, circus, couplets, courteous, Curtis, Cyrus, Douglas, Duchess, dullest, earliest, Ernest, firmest, firmness, furnace, furthest, iris, justice, Justus, kerchief, luckless, lustrous, muskets, nervous, nurses, oneness, Perseus, pumice, puppets, purchase, purpose, roughest, service, spurious, sternest, sternness, stirrups, stomachs, surface, surges, surplus, toughest, troublous, turrets, urges, versus, virus, worthiest, worthless
3 Syllables: USU
alertness, Augustus, desirous, encourage, impervious, luxurious, papyrus, reverses, rivulets, traverses
4 Syllables: UUSU
Found 64 words across 3 groupings. Skipped 5 excess words of a similar stem.