Or search: fade, fleet, lapse, elapse, finish, lessen, vanish, wither, desorb, decrease, diminish, vaporize, evanesce, disappear, terminate
3 Syllables: SUU
additive, amethyst, averages, bandages, cabbages, carriages, damages, languages, manages, packages, parishes, passages, ravages, sandwiches, savages
4 Syllables: USUU
advantages, establishes, imaginings
4 Syllables: UUSU
disadvantages

Found 19 words across 3 groupings.