Or search: modify, secern, secernate, severalise, severalize, personalize, personalise, individualise
3 Syllables: SUU
civilised, civilize, criticized, crystalline, crystallize, Israelite, minimise, minimize, typifies, visualize
4 Syllables: USUU
epitomized, uncivilized
5 Syllables: UUSUU
individualized

Found 13 words across 3 groupings. Skipped 5 excess words of a similar stem.