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
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Recent Examples of effectiveness
Each of these decisions moves the state further away from the clarity taxpayers, students and families need to evaluate the effectiveness of the system and the readiness of students.
—
Bruce Rauner, Chicago Tribune, 6 Jan. 2026
Breeze head coach Noelle Quinn compared Bueckers’ effectiveness in Unrivaled’s 3-on-3 format to Skylar Diggins, pointing to how dangerous both players become when the floor opens up and decisions have to be made quickly.
—Miami Herald, 6 Jan. 2026
The new schedule wasn’t driven by any new evidence on the safety and effectiveness of vaccines.
—Jen Christensen, CNN Money, 6 Jan. 2026
Ollie Gordon was a short-yardage liability after Halloween Maybe as a rookie, Ollie Gordon hit a rookie wall, but his effectiveness in short-yardage situations fell off a cliff after October.
—Chris Perkins, Sun Sentinel, 5 Jan. 2026
Qualifying projects must plan to use the funds to advertise and promote the city; to stimulate economic growth, overnight stays, restaurant usage or future tourism development with out-of-town visitors; and applicants must be able to track the impact and effectiveness of their event.
—James Leigh, Arkansas Online, 4 Jan. 2026
This highly flexible capability, will transform how MCM is conducted – allowing Royal Navy personnel to coordinate a fleet of uncrewed and autonomous assets, greatly increasing operational effectiveness while maximising personnel safety.
—Prabhat Ranjan Mishra, Interesting Engineering, 4 Jan. 2026
KidSmart was contributed across school districts and internationally and was so successful it was highlighted by the European Union for its effectiveness.
—Stanley S. Litow, New York Daily News, 4 Jan. 2026
Broadly speaking, the justification for criminal punishment turned away from wrath, toward utilitarian concepts of effectiveness and social benefit.
—Paul Rosenzweig, The Atlantic, 3 Jan. 2026
Recent Examples of Synonyms for effectiveness
Noun
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But his dictionary, with its conclusiveness, was a huge publishing success.—
Noun
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Of course, vaccine evaluation and monitoring should be constant, particularly for those administered to children, to ensure safety and efficacy.—
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Yes, like most supplements, the ingredients will eventually lose their efficacy over time.—
Noun
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Ittaps into themes of toxic masculinity and unveils the impact social media has on young people.—
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The impact Each missed opportunity to add or retain a star has saved the Red Sox countless millions.—
Noun
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Still, whatever validity there is to his pain, Peter becomes a high priest of hallucination and Coon’s tortured Agnes his disciple.—
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Both pleaded not guilty and sought to have their respective indictments dismissed on numerous grounds, including the validity of Halligan's appointment.—
Noun
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Though their divorce was acrimonious, and the two were later involved in various legal proceedings, the source said that Clarkson knew the importance of her children’s relationship with their father.—
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Middlebrooks echoed those concerns, emphasizing the importance of the services provided by the health system.—
Noun
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What’s your team’s greatest strength this season?—
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And that’s all without mentioning a run defense that flexed its strength against the Green Bay Packers, and a special teams group that is facilitating complementary football and more.—
Noun
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Some researchers have cast doubt on the significance of the study due to its small size.—
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Rosado is expected to address the significance of the developments for South Florida and the broader region.—
Noun
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Please consult your local burn permitting authorities as to whether burning is allowed.—
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The project has yielded some certainties and if repeated will allow the analysis of changes that eventually will help authorities make better decisions when eruptions occur.—
Cite this Entry
“Effectiveness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/effectiveness. Accessed 12 Jan. 2026.
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