Or search: bass, deed, pawn, tool, whip, writ, equip, organ, device, engine, helper, patent, tracer, weapon, compose
2 Syllables: SU
interim
3 Syllables: SUU
cinnamon, immanent, imminence, imminent, implement, impotence, impotent, impudence, impudent, incidence, incident, increment, indolence, indolent, inference, insolence, insolent, instrument, insulin, lineaments, minimum, simpleton, stimulant
4 Syllables: USUU
coincident

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