Or search: zombi, asleep, bygone, mortal, zombie, bypast, lazarus, someone, deceased, decedent, foregone, infernal, somebody, euphemism
2 Syllables: SU
Arctic, Bartlett, carted, charted, darted, garlic, guarded, hardship, hearted, Margaret, Margaret's, market, parted, started, yardstick
3 Syllables: USU
Antarctic, bombarded, discarded, imparted, lethargic, regarded, retarded, uncharted, unguarded
4 Syllables: UUSU
disregarded

Found 25 words across 3 groupings. Skipped 2 excess words of a similar stem.