as in efficacy
the power to produce a desired result
the efficaciousness of exercise in improving physical as well as emotional well-being
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Example Sentences
Recent Examples of Synonyms for efficaciousness
Noun
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But the efficacy of that killswitch is unclear.
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From there the compound would need to clear safety and efficacy testing in clinical trials before it could ever be used with patients.
Noun
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As electronic warfare capabilities continue to proliferate, maintaining navigation and mission effectiveness without constant access to satellite signals has become increasingly important.
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There may be an issue with how the pills dissolve, which could impact their effectiveness.
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“Efficaciousness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/efficaciousness. Accessed 28 Jun. 2026.
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