2 Syllables: SU
Arctic, Argus, artist, artless, Bartlett, carcase, carcass, Cardiff, carpet, carted, Charlotte, charted, darkest, darkness, darted, farthest, garlic, Garnet, garnished, guarded, hardest, hardness, hardship, harlot, harmless, harness, harshness, harvest, hearted, heartless, Jarvis, largeness, largest, Marcus, Margaret, Margaret's, Marius, market, Marquess, Marxist, parted, scarlet, sharpest, sharpness, smartness, started, target, tarnish, Tarsus, varnish, yardstick
3 Syllables: USU
Antarctic, bombarded, departed, discarded, imparted, incarnate, lethargic, regarded, regardless, retarded, uncharted, unguarded
4 Syllables: UUSU
Found 64 words across 3 groupings. Skipped 9 excess words of a similar stem.