Or search: drag, grip, hale, haul, bouse, bowse, truck, wagon, barrow, waggon, ricksha, axletree, handcart, handgrip, underrun
2 Syllables: SU
Arctic, Bartlett, charted, darted, garlic, guarded, hardship, hearted, Margaret, Margaret's, market, parted, started, yardstick
3 Syllables: USU
Antarctic, bombarded, departed, 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.