as in efficacy
the power to produce a desired result
the efficaciousness of exercise in improving physical as well as emotional well-being
Synonyms & Similar Words
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Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for efficaciousness
Noun
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One is a Cochrane review, published in January, that examined the literature on THC efficacy in treating chronic pain — another condition for which medical marijuana is frequently recommended.—
Kevin A. Sabet,
STAT,
1 Apr. 2026 -
Foundayo was approved for adults only and its safety and efficacy haven’t been established in children.—
Meg Tirrell,
CNN Money,
1 Apr. 2026
Noun
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The brief casts doubt on the agency’s effectiveness due to a lack of partnerships between the FWA, local authorities, unions, enforcement agencies and community organizations.—
Angela Velasquez,
Footwear News,
6 Apr. 2026
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But the Iran war has also highlighted the effectiveness of low-cost weapons.—
Jason Ma,
Fortune,
6 Apr. 2026
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Cite this Entry
“Efficaciousness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/efficaciousness. Accessed 8 Apr. 2026.
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