Efficacy synonyms and antonyms

ĕf'ĭ-kə-sē

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effectiveness
The property of being effective, of achieving results.
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potency
Inherent capacity for growth and development; potentiality.
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ability (related)
(Countable) A skill or competence in doing; mental power; talent; aptitude. [First attested in the early 17 th century.]
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effectuality
The state or condition of being effectual.
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inefficacy (antonym)
The condition of being ineffective
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productiveness
The state of being productive.
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efficiency (related)
The ratio of the energy delivered by a machine to the energy supplied for its operation.
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impotency (antonym)
Dated form of impotence.
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efficaciousness
Quality of being efficacious.
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affect (related)
(Psychol.) An emotion or feeling attached to an idea, object, etc.
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usefulness (related)
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acceptability (related)
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advantage
Any condition, circumstance, opportunity or means, particularly favorable to success, or to any desired end.
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effect
(Cinematography) An illusion produced by technical means (as in "special effect")
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effectualness
The state or condition of being effectual.
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unproductiveness (antonym)
The characteristic of being unproductive; lack of productiveness.
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influence
The power to affect, control or manipulate something or someone; the ability to change the development of fluctuating things such as conduct, thoughts or decisions.
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tolerability (related)
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cost-effectiveness (related)
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validity (related)
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bioavailability (related)
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allergenicity (related)
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pharmacokinetics (related)
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uselessness (antonym)
The quality of being useless
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weakness (antonym)
(Countable) An inadequate quality; fault
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failure (antonym)
The condition or fact of being insufficient or falling short:
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inefficiency (antonym)
An inefficient act, design, or procedure:
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immunogenicity (related)
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toxicity (related)
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Find another word for efficacy. In this page you can discover 29 synonyms, antonyms, idiomatic expressions, and related words for efficacy, like: effectiveness, potency, ability, effectuality, inefficacy, productiveness, efficiency, impotency, efficaciousness, affect and usefulness.
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Efficacy Sentence Examples

  • He was a firm believer in the efficacy of culture.

  • Thus he allowed the necessity of good works to salvation, but not in the old sense; proposed to allow the seven sacraments, but only as rites which had no inherent efficacy to salvation, and so on.

  • When its efficacy was not eternal, its effect was considered to endure for twenty years.

  • Many topical applications are of great efficacy.

  • Suarez endeavoured to reconcile this view with the more orthodox doctrines of the efficacy of grace and special election, maintaining that, though all share in an absolutely sufficient grace, there is granted to the elect a grace which is so adapted to their peculiar dispositions and circumstances that they infallibly, though at the same time quite freely, yield themselves to its influence.

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Words near efficacy in the Thesaurus