Or search: diocese, bishopric, episcopate
2 Syllables: SU
Cyrus, diaries, direst, iris, pirates, violets, virus
3 Syllables: SUU
diocese, dynasties, dynasty, inquiries, piously, primacy, primaries, privacy, righteously, righteousness, riotous
3 Syllables: USU
desirous, enquiries, papyrus
4 Syllables: USUU
anxieties, proprieties, psychiatrist, refineries, unrighteousness, varieties

Found 27 words across 4 groupings. Skipped 2 excess words of a similar stem.