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
As electronic warfare capabilities continue to proliferate, maintaining navigation and mission effectiveness without constant access to satellite signals has become increasingly important.
—
Kaif Shaikh,
Interesting Engineering,
22 June 2026
There may be an issue with how the pills dissolve, which could impact their effectiveness.
—
Jenna Anderson,
Health,
22 June 2026
Still, questions linger about the effectiveness of such settlement agreements.
—
Adriana Pérez,
Chicago Tribune,
22 June 2026
Companies are championing this approach, highlighting its cost-effectiveness compared to new batteries.
—
Ken Silverstein,
Forbes.com,
21 June 2026
Heart risks In 2015, the US Food and Drug Administration required label changes on testosterone therapy that stated the safety and effectiveness had not been established for men who had signs and symptoms associated with idiopathic hypogonadism, a condition that involves low testosterone levels.
—
Jacqueline Howard,
CNN Money,
20 June 2026
Kaif Shaikh,
Interesting Engineering,
22 June 2026
There may be an issue with how the pills dissolve, which could impact their effectiveness.
—
Jenna Anderson,
Health,
22 June 2026
Still, questions linger about the effectiveness of such settlement agreements.
—
Adriana Pérez,
Chicago Tribune,
22 June 2026
Companies are championing this approach, highlighting its cost-effectiveness compared to new batteries.
—
Ken Silverstein,
Forbes.com,
21 June 2026
Heart risks In 2015, the US Food and Drug Administration required label changes on testosterone therapy that stated the safety and effectiveness had not been established for men who had signs and symptoms associated with idiopathic hypogonadism, a condition that involves low testosterone levels.
—
Jacqueline Howard,
CNN Money,
20 June 2026
Recent Examples of Synonyms for effectiveness
Noun
-
But his dictionary, with its conclusiveness, was a huge publishing success.
Noun
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But the efficacy of that killswitch is unclear.
-
From there the compound would need to clear safety and efficacy testing in clinical trials before it could ever be used with patients.
Noun
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Many of the injuries displayed rectangular, band-like and patterned characteristics consistent with impact from a belt-like object, Detective Balders wrote.
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This has fueled debate over their impact on the game, with some viewers complaining about being exposed to commercials during the three-minute stoppages.
Noun
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Look back at a full timeline of the ransom notes, their contents and what investigators have said about their validity.
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Officials have said little about the authenticity of the letters, leaving questions about their validity unanswered.
Noun
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Kerigan Coates, who's studying neuroscience at the University of San Diego, received a scholarship and the inspiration to keep educating people about the importance of mental health.
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Just days after Bode's arrest, Morgan reshared two Instagram Stories from midwife Lindsey Meeheis, reminding parents about the importance of water safety to mark the 8th anniversary of Emeline's death.
Noun
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The study was small, and follow-up research has not yet confirmed those results with the same strength.
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Draw upon your well of strength.
Noun
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Archaeologists have determined the mounds served ceremonial, spiritual and burial functions, though many details of their cultural significance remain a mystery.
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Fay believes the significance of America's birth, with its ideals of freedom and equality, has the power to unite.
Noun
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Last summer, France’s public health authority recorded 1,418 drowning incidents — a 14% rise on the previous year — with deaths among teenagers aged 13 to 17 more than doubling.
-
The Altima struck the center median, according to authorities.
Cite this Entry
“Effectiveness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/effectiveness. Accessed 30 Jun. 2026.
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