Or search: raf, aken, bonn, jena, nato, oder, ruhr, koln, essen, halle, rhein, rhine, pfalz, saale, weser
3 Syllables: SUU
Burgundy, certainly, certainties, certainty, courtesies, currencies, currency, currently, fervently, Germany, Hercules, nurseries, urgency, urgently
4 Syllables: SUUU
emergencies, emergency
4 Syllables: USUU
absurdities, concurrently, determinedly, fraternities, subserviency, uncertainly, uncertainties, uncertainty
5 Syllables: UUSUU
anniversaries, inadvertently, universities, University's

Found 28 words across 4 groupings.