3 Syllables: SUU
Burgundy, certainly, certainties, certainty, Coventry, currencies, currency, fervently, Germany, Germany's, slovenly, suddenly, sullenly, urgency, urgently
4 Syllables: SUUU
emergencies, emergency
4 Syllables: USUU
concurrently, determinedly, subserviency, uncertainly, uncertainties, uncertainty
5 Syllables: UUSUU
inadvertently

Found 24 words across 4 groupings.