2 Syllables: SU
3 Syllables: SUU
implement, impotence, impotent, impudence, impudent, incidence, incident, increment, indolence, indolent, inference, insolence, insolent, instrument, lineaments, simpleton, stimulant
4 Syllables: USUU
Found 19 words across 3 groupings. Skipped 4 excess words of a similar stem.