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
The third down against the Chiefs shows all three at work and perhaps provided a blueprint for how Denver can maximize Nix’s effectiveness in the postseason.
—
Parker Gabriel, Denver Post, 12 Jan. 2026
It was used with extreme effectiveness by Adolf Hitler during the 1930s and continued until his death by suicide in 1945.
—Chicago Tribune, 12 Jan. 2026
The Canucks believe that with centre Marco Rossi out due to injury, the roster has once again fallen below a baseline level of functional effectiveness down the middle of its forward group.
—Thomas Drance, New York Times, 12 Jan. 2026
Their effectiveness was discovered long before football was invented.
—Steve Henson, Los Angeles Times, 12 Jan. 2026
Avoid using abrasive materials or harsh cleaners on non-stick baking sheets to prevent damaging the coating and compromising their effectiveness over time.
—Madeline Buiano, Martha Stewart, 11 Jan. 2026
Its effectiveness for supplemental purposes has only limited evidence.
—Sara Hoffman, Verywell Health, 11 Jan. 2026
Battlefield use has further demonstrated its effectiveness against fast-moving aerial threats.
—Aamir Khollam, Interesting Engineering, 10 Jan. 2026
Although it is often presented as an expression of sheer force, its effectiveness ultimately rests on something softer – the manner in which a government performs moral authority and projects credibility to the world.
—Maurizio Valsania, The Conversation, 9 Jan. 2026
Parker Gabriel, Denver Post, 12 Jan. 2026
It was used with extreme effectiveness by Adolf Hitler during the 1930s and continued until his death by suicide in 1945.
—Chicago Tribune, 12 Jan. 2026
The Canucks believe that with centre Marco Rossi out due to injury, the roster has once again fallen below a baseline level of functional effectiveness down the middle of its forward group.
—Thomas Drance, New York Times, 12 Jan. 2026
Their effectiveness was discovered long before football was invented.
—Steve Henson, Los Angeles Times, 12 Jan. 2026
Avoid using abrasive materials or harsh cleaners on non-stick baking sheets to prevent damaging the coating and compromising their effectiveness over time.
—Madeline Buiano, Martha Stewart, 11 Jan. 2026
Its effectiveness for supplemental purposes has only limited evidence.
—Sara Hoffman, Verywell Health, 11 Jan. 2026
Battlefield use has further demonstrated its effectiveness against fast-moving aerial threats.
—Aamir Khollam, Interesting Engineering, 10 Jan. 2026
Although it is often presented as an expression of sheer force, its effectiveness ultimately rests on something softer – the manner in which a government performs moral authority and projects credibility to the world.
—Maurizio Valsania, The Conversation, 9 Jan. 2026
Recent Examples of Synonyms for effectiveness
Noun
-
But his dictionary, with its conclusiveness, was a huge publishing success.—
Louis Menand,
New Yorker,
22 Dec. 2025
Noun
-
The report said reviews of drugs from Disc Medicine and Sanofi were also delayed to review their safety and efficacy.—
Michelle Fox,Darla Mercado, CFP®,
CNBC,
15 Jan. 2026
-
Even though the relevant trial evidence showed significant improvements in patients’ blood pressure, fasting glucose and weight with minimal safety issues, the agency is insisting on additional efficacy data.—
Ross Marchand,
Baltimore Sun,
14 Jan. 2026
Noun
-
The bottle is small, easy to pack, and a little goes a long way—proof that sometimes even the smallest things have a big impact.—
Chaise Sanders,
Travel + Leisure,
15 Jan. 2026
-
The economic cost is caused by losses in the fishing industry, damage to coastal communities and impacts to systems that help fortify those communities, like mangroves and reefs.—
Julia Jacobo,
ABC News,
15 Jan. 2026
Noun
-
Advocates have been at odds with the city for years over the state of their beloved shelter, prompting an audit that confirmed the validity of many of their concerns about mismanagement, operating over capacity and inadequate care.—
Devan Patel,
Mercury News,
14 Jan. 2026
-
All of the schools involved determined there was no validity or credibility to the threats, according to investigators.—
Jennifer McRae,
CBS News,
14 Jan. 2026
Noun
-
Miller said he’s always emphasized to his players the importance of getting out of their comfort zones and being the best version of themselves possible.—
Shaun Goodwin,
Idaho Statesman,
14 Jan. 2026
-
The dividing line between state and federal government Michele Goodwin, professor of constitutional law at Georgetown University, said understanding the significance of Illinois and Minnesota’s lawsuits begins with understanding the importance of the Bill of Rights and the 10th Amendment.—
Chelsea Bailey,
CNN Money,
14 Jan. 2026
Noun
-
Because confinement of the plasma in a stellarator is driven solely by the external magnets, modifying the shape and strength of the fields has a major impact on performance.—
Prabhat Ranjan Mishra,
Interesting Engineering,
16 Jan. 2026
-
Celebrini’s assist on Regenda’s goal gives him 71 points, including 50 even-strength points, in 46 games this season.—
Curtis Pashelka,
Mercury News,
16 Jan. 2026
Noun
-
Some researchers have cast doubt on the significance of the study due to its small size.—
Melissa Rudy,
FOXNews.com,
7 Jan. 2026
-
Rosado is expected to address the significance of the developments for South Florida and the broader region.—
Steven Yablonski,
CBS News,
7 Jan. 2026
Noun
-
Please consult your local burn permitting authorities as to whether burning is allowed.—
NC Weather Bot,
Charlotte Observer,
11 Jan. 2026
-
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.—
Arkansas Online,
Arkansas Online,
11 Jan. 2026
Cite this Entry
“Effectiveness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/effectiveness. Accessed 18 Jan. 2026.
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