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
However, the study didn’t compare gadusol’s effectiveness to currently available sunscreens.
—
Devika Rao, TheWeek, 18 May 2026
Instead, the court ruled that the effectiveness of Missouri’s map was in the hands of Hoskins, the secretary of state, who has the power to decide whether to certify the referendum for the ballot.
—Kacen Bayless, Kansas City Star, 18 May 2026
Measure leadership by what happens without you The second shift is in how leadership effectiveness gets evaluated.
—Rhett Power, Forbes.com, 17 May 2026
Høeg has acknowledged the effectiveness of some vaccines, including the measles vaccine.
—Michael Kaplan, CBS News, 16 May 2026
While its effectiveness has been panned by many, including coaches, former coaches, the NFL Players Association and football fans, the rule remains in force today.
—Andrea Hsu, NPR, 15 May 2026
Those trials examined the effectiveness of different types of protein (whey, milk, casein, collagen, meat, soy, rice, oat, and dietary protein) in combination with and separate from physical exercise (resistance training, aerobic exercise, and multicomponent training).
—Malissa Rodenburg, Health, 15 May 2026
Dietary supplements are subject to less strict regulation, which can make quality and effectiveness inconsistent between products.
—Ryan Brennan, Sacbee.com, 15 May 2026
Issues under consideration include the visibility and prominence of European works, fairness in the advertising market, and the effectiveness of rules protecting minors from harmful content on video-sharing platforms.
—Nick Vivarelli, Variety, 15 May 2026
Devika Rao, TheWeek, 18 May 2026
Instead, the court ruled that the effectiveness of Missouri’s map was in the hands of Hoskins, the secretary of state, who has the power to decide whether to certify the referendum for the ballot.
—Kacen Bayless, Kansas City Star, 18 May 2026
Measure leadership by what happens without you The second shift is in how leadership effectiveness gets evaluated.
—Rhett Power, Forbes.com, 17 May 2026
Høeg has acknowledged the effectiveness of some vaccines, including the measles vaccine.
—Michael Kaplan, CBS News, 16 May 2026
While its effectiveness has been panned by many, including coaches, former coaches, the NFL Players Association and football fans, the rule remains in force today.
—Andrea Hsu, NPR, 15 May 2026
Those trials examined the effectiveness of different types of protein (whey, milk, casein, collagen, meat, soy, rice, oat, and dietary protein) in combination with and separate from physical exercise (resistance training, aerobic exercise, and multicomponent training).
—Malissa Rodenburg, Health, 15 May 2026
Dietary supplements are subject to less strict regulation, which can make quality and effectiveness inconsistent between products.
—Ryan Brennan, Sacbee.com, 15 May 2026
Issues under consideration include the visibility and prominence of European works, fairness in the advertising market, and the effectiveness of rules protecting minors from harmful content on video-sharing platforms.
—Nick Vivarelli, Variety, 15 May 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
-
For that reason, the study failed to achieve its primary efficacy goal, which was a dose response.—
Adam Feuerstein,
STAT,
14 May 2026
-
Novo has said that the similar efficacy of more than 20% between high-dose Wegovy and Zepbound could help the company win back market share from Lilly.—
Annika Kim Constantino,
CNBC,
12 May 2026
Noun
-
Rowles is also making an impact at Marist in flag football.—
Tony Baranek,
Chicago Tribune,
14 May 2026
-
Not even BriseBois anticipated James, who was signed as a free agent two days into training camp after his draft rights with the Blackhawks expired, would have made such a quick impact.—
Eduardo A. Encina,
The Orlando Sentinel,
13 May 2026
Noun
-
Agent Ammie is the Special Agent, Review Fraud Division, who investigates every single review on Liners to verify its validity and unbiasedness.—
Nia Bowers,
USA Today,
12 May 2026
-
Only a few of the candidates explicitly raise doubts about the validity of the 2020 election on their campaign websites.—
Arkansas Online,
Arkansas Online,
11 May 2026
Noun
-
Palmer’s shot is well blocked by Marc Guehi — which underlines the importance of their decision-making in these moments.—
Cerys Jones,
New York Times,
13 May 2026
-
From 1949 to 1987, the Federal Communications Commission held radio and television stations to a standard requiring them to air opposing sides of public issues of importance, a policy known as the fairness doctrine.—
Encyclopedia Britannica,
Encyclopedia Britannica,
13 May 2026
Noun
-
The bird has long symbolized American values like strength, freedom and independence, said Kochersperger.—
Sarah Raza,
Chicago Tribune,
15 May 2026
-
American oak trees symbolize the enduring strength and resilience of our people and nation.—
Joseph Bonasia,
The Orlando Sentinel,
15 May 2026
Noun
-
That projection is based on the player’s performance in each metric over the last three seasons (five for goalies), weighted for recency where more recent seasons carry more significance and regressed to the mean.—
Dom Luszczyszyn,
New York Times,
17 May 2026
-
The significance of these findings The study suggests human right-handedness may be deeply rooted in the same evolutionary changes that transformed how our ancestors moved and interacted with the world.—
Rupendra Brahambhatt,
Interesting Engineering,
16 May 2026
Noun
-
Chelsea’s squad demographic falls somewhere in between but is probably closer to the former than the latter, and a football legend with his resume should not encounter the authority problems faced by owner BlueCo’s previous hires.—
Liam Twomey,
New York Times,
17 May 2026
-
Health authorities said Congo has stockpiles of Ebola treatments and approximately 2,000 doses of the Ervebo vaccine, though officials cautioned the vaccine is only effective against the Ebola Zaire strain and not against Sudan or Bundibugyo variants.—
Jasmine Baehr,
FOXNews.com,
16 May 2026
Cite this Entry
“Effectiveness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/effectiveness. Accessed 20 May. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
