noun
canceling, annulment, nullification, abrogation, dissolution, dissolving, invalidation, invalidating, revocation, revoking, repudiation, repeal, abolition, abolishing, retraction, retracting, reversing, reversal, annulling, voidance, voiding, rescinding, recall, recalling, overruling, undoing, withdrawing, abandonment, abandoning; see also removal 1, retirement 1.