effectualness

noun

Definition of effectualnessnext
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

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Antonyms & Near Antonyms

Example Sentences

Recent Examples of Synonyms for effectualness
  1. efficacy
  2. effectiveness
Noun
  • Hope Florida Foundation got a new board and filed tax returns, but criticisms of its efficacy still dog its leaders.
    — Christopher Spata, Miami Herald, 17 Oct. 2026
  • In oncology, where treatment efficacy hinges on precise, patient‑specific data, even a small AI hallucination, such as a mistimed test, can misdirect care.
    — Brad Kreick, Forbes.com, 16 Oct. 2026
Definition of efficacy
Noun
  • The effectiveness of the approach will depend on how well the systems perform under operational conditions and against evolving electronic warfare threats.
    — Aamir Khollam, Interesting Engineering, 16 Oct. 2026
  • That recommendation went against the scientific conclusion of FDA’s staff scientists, who reiterated that none of the peptides had been studied enough to establish their safety and effectiveness.
    — ABC News, ABC News, 15 Oct. 2026
Definition of effectiveness
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.

Browse Nearby Words

effectually
effectualness
effectuate
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Cite this Entry

“Effectualness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/effectualness. Accessed 19 Oct. 2026.

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