Noun

• S: (n) effectiveness, effectivity, effectualness, effectuality (power to be effective; the quality of being able to bring about an effect)
• direct hyponym / full hyponym
• S: (n) incisiveness, trenchancy (keenness and forcefulness of thought or expression or intellect)
• direct hypernym / inherited hypernym / sister term
• S: (n) effectiveness, effectivity, effectualness, effectuality (power to be effective; the quality of being able to bring about an effect)
• derivationally related form
• S: (n) efficacy, efficaciousness (capacity or power to produce a desired effect) "concern about the safety and efficacy of the vaccine"
• attribute
• direct hypernym / inherited hypernym / sister term
• S: (n) power, powerfulness (possession of controlling influence) "the deterrent power of nuclear weapons"; "the power of his love saved her"; "his powerfulness was concealed by a gentle facade"
• S: (n) quality (an essential and distinguishing attribute of something or someone) "the quality of mercy is not strained"--Shakespeare
• S: (n) attribute (an abstraction belonging to or characteristic of an entity)
• S: (n) abstraction, abstract entity (a general concept formed by extracting common features from specific examples)
• S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
• antonym
• derivationally related form