Or search: decennary, decennium, millenary, millennium, quattrocento
3 Syllables: SUU
century, century's, densities, embassies, Emery, emphases, energies, energy, enmities, memories, memory, plenary, sensory, tendencies, tenderly
4 Syllables: SUUU
dispensary
4 Syllables: USUU
dependencies, exemplary, extempore, parentheses, peremptory, propensities, solemnities
4 Syllables: UUSU
elementary
5 Syllables: UUSUU
alimentary, complimentary, documentary, parliamentary, penitentiary, rudimentary, sedimentary, supplementary, testamentary
6 Syllables: UUUSUU
plenipotentiaries

Found 34 words across 6 groupings.