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
  • Huynh described the phase 3 results as clinically meaningful and likely to support regulatory approval, but said the primary efficacy result landed at the low end of investor expectations.
    — Annika Kim Constantino, CNBC, 23 Oct. 2026
  • While that efficacy doesn’t match the performance of a rival drug from Roche, Novartis’ treatment has a cleaner safety profile that could give it a shot at being competitive in the market.
    — Andrew Joseph, STAT, 23 Oct. 2026
Definition of efficacy
Noun
  • The idea would be to equip all parties, from payers to providers to patients, with insights into effectiveness, cost, and value.
    — Dana P. Goldman, STAT, 22 Oct. 2026
  • Other topical treatments—such as retinoids, peptides, and vitamin C—are backed by years of research on safety and effectiveness.
    — Ashley Abramson, Allure, 22 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 26 Oct. 2026.

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