Or search: urgency, celerity, rapidity, immediacy, quickness, speediness, instantaneousness
3 Syllables: SUU
gingerly, industry, infamy, infancy, infantry, injury, inquiry, instantly, inwardly, linearly, minstrelsy, stringency, sympathy, symphonies, symphony
4 Syllables: USUU
contingencies, contingency, delinquencies, delinquency
5 Syllables: UUSUU
ignominiously
6 Syllables: UUUSUU
idiosyncrasy

Found 21 words across 4 groupings.