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Synonyms and Antonyms of efficacy

the power to produce a desired result
  • questioned the efficacy of the alarms in actually preventing auto theft
Synonyms of efficacy

edge, effectiveness, effectualness, efficaciousness, efficacity, efficiency, productiveness
Words Related to efficacy

ability, capability, capacity

potency, puissance, strength
Near Antonyms of efficacy

inability, inadequacy, inadequateness, incompetence, incompetency
Antonyms of efficacy

ineffectiveness, ineffectuality, ineffectualness, inefficiency

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