2 Syllables: SU
arches, Argus, artist, artist's, Austrians, bargains, barges, carcase, carcass, Carthage, cartridge, darkens, darkest, darkness, Doris, farthest, gardens, garlands, guardians, hardens, hardest, hardness, harmless, harness, harshness, harvest, heartless, Jarvis, largest, Marcus, margins, Marius, Marquess, marshes, Martin's, Marxist, pardons, Parsons, partridge, sharpest, sharpness, Spartans, Tarsus, Yarmouth
3 Syllables: SUU
3 Syllables: USU
4 Syllables: UUSU
Found 47 words across 4 groupings. Skipped 2 excess words of a similar stem.