effectiveness

1 the capacity to persuade the “guilty” verdict was all the proof needed of the effectiveness of the prosecutor's closing argument Synonyms authority, conclusiveness, convincingness, cogency, force, forcefulness, persuasion, persuasiveness, suasivenessRelated Words impact, might, power, punch, strength, weight; believability, credibility, soundness, validity; authoritativeness, definitiveness; influence, sway; appeal, seductivenessNear Antonyms invalidity, shakiness, unsoundness; feebleness, powerlessness, weaknessAntonyms inconclusiveness, ineffectiveness, ineffectuality, ineffectualness

2 the power to produce a desired result the huge upsurge in sales pretty much demonstrated the effectiveness of the new ad campaign Synonyms edge, efficacy, effectualness, efficaciousness, efficacity, efficiency, productivenessRelated Words ability, capability, capacity; potency, puissance, strengthNear Antonyms inability, inadequacy, inadequateness, incompetence, incompetencyAntonyms ineffectiveness, ineffectuality, ineffectualness, inefficiency

3 the quality of an utterance that provokes interest and produces an effect your writing lacks effectiveness because practically every sentence is in the passive voice Synonyms cogency, punch, force, forcefulness, impact, pointRelated Words payoff; importance, significance; appeal, attraction, charm, fascination