Or search: vouch, qualify, specify, guarantee, stipulate, undertake
3 Syllables: SUU
violated
4 Syllables: SUUU
calculated, circulated, desolated, emulated, formulated, granulated, insulated, isolated, mutilated, postulated, regulated, simulated, speculated, stimulated, tabulated
4 Syllables: USUU
annihilated
5 Syllables: USUUU
accumulated, assimilated, capitulated, coagulated, congratulated, depopulated, expostulated, inoculated, interpolated, manipulated, unregulated
6 Syllables: UUSUUU
recapitulated

Found 29 words across 5 groupings.