Or search: eased, relieved, mitigated
4 Syllables: SUUU
deviated, expiated, mediated, permeated, radiated, satiated, vitiated
5 Syllables: USUUU
abbreviated, affiliated, appreciated, appropriated, conciliated, delineated, depreciated, emaciated, enunciated, humiliated, infuriated, initiated, irradiated, negotiated, propitiated, retaliated, substantiated
6 Syllables: UUSUUU
differentiated, uninitiated
7 Syllables: UUUSUUU
undifferentiated

Found 27 words across 4 groupings.