The Collaborative International Dictionary of English v.0.48:
effectuality \effectuality\ n. the power to be effective. Syn: effectiveness, effectivity, effectualness. [WordNet 1.5]WordNet (r) 3.0 (2006):
effectuality n 1: power to be effective; the quality of being able to bring about an effect [syn: effectiveness, effectivity, effectualness, effectuality] [ant: ineffectiveness, ineffectuality, ineffectualness]