3 Syllables: SUU
gingerly, hideously, idiocy, industry, infamy, infancy, infantry, injury, inquiry, instantly, inwardly, linearly, minstrelsy, seriously, simile, stringency, sympathy, symphony
4 Syllables: USUU
contingency, delinquency, facsimile, industrially, insidiously, materially, mysteriously, proverbially
5 Syllables: UUSUU
6 Syllables: UUUSUU
Found 28 words across 4 groupings. Skipped 1 excess word of a similar stem.