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
Relevance
Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for efficaciousness
Noun
-
The report said reviews of drugs from Disc Medicine and Sanofi were also delayed to review their safety and efficacy.—
Michelle Fox,Darla Mercado, CFP®,
CNBC,
15 Jan. 2026 -
Even though the relevant trial evidence showed significant improvements in patients’ blood pressure, fasting glucose and weight with minimal safety issues, the agency is insisting on additional efficacy data.—
Ross Marchand,
Baltimore Sun,
14 Jan. 2026
Noun
-
The third down against the Chiefs shows all three at work and perhaps provided a blueprint for how Denver can maximize Nix’s effectiveness in the postseason.—
Parker Gabriel,
Denver Post,
12 Jan. 2026
-
It was used with extreme effectiveness by Adolf Hitler during the 1930s and continued until his death by suicide in 1945.—
Chicago Tribune,
Chicago Tribune,
12 Jan. 2026
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Cite this Entry
“Efficaciousness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/efficaciousness. Accessed 16 Jan. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
