Or search: ax, axe, sack, abort, lapse, climax, finish, modify, recess, retire, vanish, adjourn, closure, cloture, dismiss
4 Syllables: SUUU
alienating, circulating, culminating, dominating, emanating, fascinating, nominating, ordinating
5 Syllables: USUUU
contaminating, coordinating, discriminating, disseminating, eliminating, exterminating, illuminating, originating, predominating, subordinating

Found 18 words across 2 groupings.