Or search: wintry, brumal, hiemal, hibernal
3 Syllables: SUU
gingerly, industry, infamy, infancy, infantry, injuries, injury, inquiries, inquiry, instantly, inwardly, linearly, minstrelsy, stringency, sympathy, symphony
4 Syllables: USUU
contingency, delinquency
5 Syllables: UUSUU
ignominiously
6 Syllables: UUUSUU
idiosyncrasy

Found 20 words across 4 groupings.