3 Syllables: SUU
gingerly, industry, infamy, infancy, infantry, injury, inquiry, instantly, inwardly, linearly, simile, stringency, sympathy, symphony
4 Syllables: USUU
5 Syllables: UUSUU
6 Syllables: UUUSUU
Found 19 words across 4 groupings. Skipped 1 excess word of a similar stem.