effectiveness

noun

Definition of effectivenessnext
1
as in conclusiveness
the capacity to persuade the "guilty" verdict was all the proof needed of the effectiveness of the prosecutor's closing argument

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms
2
as in efficacy
the power to produce a desired result the huge upsurge in sales pretty much demonstrated the effectiveness of the new ad campaign

Synonyms & Similar Words

Antonyms & Near Antonyms
3
as in impact
the quality of an utterance that provokes interest and produces an effect your writing lacks effectiveness because practically every sentence is in the passive voice

Synonyms & Similar Words

Example Sentences

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.
Recent Examples of effectiveness Under Kennedy, the FDA has set up extra hurdles for vaccine testing and blocked the publication of research into the effectiveness of COVID-19 shots. — Matthew Perrone, Chicago Tribune, 19 Aug. 2026 Under Kennedy, the FDA has also set up extra hurdles for vaccine testing and blocked the publication of research into the effectiveness of COVID-19 shots. — Ali Swenson, Los Angeles Times, 19 Aug. 2026 His consistency must get better, too, both with pass blocking reliability and with his effectiveness in the Bears’ tight-zone and gap-scheme running plays. — Dan Wiederer, New York Times, 19 Aug. 2026 Unlike many psychiatric prescriptions, the clinical effectiveness of psychedelics can’t be divorced from the context in which they’re taken. — Mike McRae 19, New Atlas, 19 Aug. 2026 Its multitasking ability and powerful effectiveness earned top marks from Glamour testers. — Mary Honkus, Glamour, 18 Aug. 2026 But these undertakings remain voluntary, their effectiveness has not been proved, and these companies’ private incentives will inevitably diverge from public interests. — Elizabeth Sherwood-Randall, Foreign Affairs, 18 Aug. 2026 Uncharismatic leaders, often measured, realistic, and execution-oriented, are frequently overlooked despite their effectiveness. — Tomas Chamorro-Premuzic, Forbes.com, 18 Aug. 2026 For ​​maximum effectiveness, children should opt for consistent, full-time daily wear. — Anna Halkidis, Parents, 18 Aug. 2026
Recent Examples of Synonyms for effectiveness
  1. conclusiveness
  2. efficacy
  3. impact
  4. validity
  5. importance
  6. strength
  7. significance
  8. authority
Noun
  • On Friday morning, Burke’s defense team tried to sow doubt about the conclusiveness of the autopsy conducted in the case.
    — Richard Winton, Los Angeles Times, 24 July 2026
  • But his dictionary, with its conclusiveness, was a huge publishing success.
    — Louis Menand, New Yorker, 22 Dec. 2025
Definition of conclusiveness
Noun
  • Marston’s company has applied for grants to evaluate the efficacy of its drones.
    — Cindy Von Quednow, CNN Money, 24 Aug. 2026
  • The drawback of using essential oils to repel flies is that their efficacy is short-lived.
    — Louise Parks, Martha Stewart, 21 Aug. 2026
Definition of efficacy
Noun
  • And how much of a team’s ranking is based on program history versus the number of returning starters — or perhaps the impact of portal recruits and/or true freshmen?
    — Mike Griffith, AJC.com, 22 Aug. 2026
  • From DiPietro on out, to defenseman Frederic Brunet to Fraser Minten to Marat Khusnutdinov to the club’s top prospect James Hagens, those players will have to have positive impacts if this team is to compete in the deadly Atlantic Division.
    — Steve Conroy, Boston Herald, 21 Aug. 2026
Definition of impact
Noun
  • The crux of the dispute surrounds the validity of a contract extension option for Mateta, one which Palace exercised in December 2024.
    — Matt Woosnam, New York Times, 23 Aug. 2026
  • As enterprise value continues to shift toward intangible assets, IP ownership, validity and enforceability directly inform valuation defensibility and post closing performance assumptions.
    — Keegan Caldwell, Forbes.com, 18 Aug. 2026
Definition of validity
Noun
  • Hispanic and African American households also collectively drive more than a third (36 percent) of TikTok Shop’s beauty spending — which highlights the importance of diverse products and paying attention to a range of multicultural audiences.
    — Fairchild Studio, Footwear News, 21 Aug. 2026
  • The district set its screen time use targets for elementary and middle school students, but did not set a target for high school students, noting the importance of digital literacy skills as students prepare for college or careers.
    — Becca Savransky, Idaho Statesman, 21 Aug. 2026
Definition of importance
Noun
  • Highlighting the strength of the two countries’ ties, Russian state media has shown images of North Korean troops in training inside Russia over the past year, and Kim Jong Un opened a memorial to North Korea’s Ukraine dead in April.
    — Nick Paton Walsh, CNN Money, 21 Aug. 2026
  • Communities still recovering from last weekend’s hurricane in Hawaii could get pounded again in coming days from another tropical system gaining strength over warm Pacific waters.
    — ABC News, ABC News, 20 Aug. 2026
Definition of strength
Noun
  • Keep it up Keeping in mind that the Chiefs chose not to play several players of significance in their first preseason game, their two best players were rookie running back Emmett Johnson on offense and safety Jaden Hicks on defense.
    — Blair Kerkhoff, Kansas City Star, 21 Aug. 2026
  • Two intense races are at the top of the ticket, and the results will not only hold significance for Georgians at home, but also for Georgia's representation in Congress.
    — Irene Wright, USA Today, 20 Aug. 2026
Definition of significance
Noun
  • Apart from a drunken brawl in Ukraine a few years ago, which resulted in no charges, she was not known to the authorities.
    — Ivana Kottasová, CNN Money, 20 Aug. 2026
  • An inmate who walked away from an El Dorado County conservation camp earlier this year was arrested in Southern California for burglary, authorities said on Wednesday.
    — Brandon Downs, CBS News, 20 Aug. 2026
Definition of authority

Browse Nearby Words

effectively
effectiveness
effects
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Cite this Entry

“Effectiveness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/effectiveness. Accessed 25 Aug. 2026.

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