3 Syllables: SUU
bickerings, bigoted, chrysalis, grimaces, mistresses, primitive, pyramid, riveted, syphilis, villages
4 Syllables: USUU
deliberative, derivative, dispirited, Elisabeth, Elizabeth, indicative, inhibited, initiative, prohibitive, revisited
Found 20 words across 2 groupings. Skipped 3 excess words of a similar stem.