as in efficacy
the power to produce a desired result
the effectualness of that new cancer treatment has yet to be proven
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for effectualness
efficacy
Noun
-
Compounded drugs are not reviewed for safety and efficacy by the FDA.—
Anjeanette Damon,
ProPublica,
30 July 2025 -
Children: There is a lack of research on the safety and efficacy of this treatment in children.—
Anna Giorgi,
Verywell Health,
29 July 2025
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
“Effectualness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/effectualness. Accessed 4 Aug. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share