as in efficacy
the power to produce a desired result
the effectualness of that new cancer treatment has yet to be proven
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Recent Examples of Synonyms for effectualness
efficacy
Noun
-
So, any vaccine safety and efficacy trial includes children who are getting the entire vaccine schedule in addition to the vaccine being tested, providing information on cumulative effects with every new addition.—
ArsTechnica,
ArsTechnica,
25 June 2025 -
In the morning, CDC staff presented data on COVID-19 vaccines, showing safety and efficacy as well as a reduction in hospitalizations and deaths.—
Mary Kekatos,
ABC News,
25 June 2025
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“Effectualness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/effectualness. Accessed 1 Jul. 2025.
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