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
These processes monitor patient safety, clinical documentation, treatment outcomes and overall operational effectiveness, reinforcing a culture of accountability and consistency.
—
Ascend Agency, Sun Sentinel, 4 May 2026
The new data, which are released annually, follow a year of confusion and doubt in some quarters over the safety and effectiveness of vaccines.
—Lisa Schencker, Chicago Tribune, 4 May 2026
There needs to be more data on CARE Court’s implementation and effectiveness.
—Kaitlyn Schallhorn, Oc Register, 4 May 2026
Why Baking Soda Is Best For Grout Like white vinegar, baking soda tends to be a tried-and-true household cleaner for it's effectiveness at removing dirt and grime.
—Ashlyn Needham, Southern Living, 2 May 2026
While its effectiveness at blocking radiation and extremely lightweight nature are the most compelling details of this material, its stretchiness could lend to even more benefits.
—Chelsea Gohd, Space.com, 1 May 2026
This is crucial to maintaining the effectiveness of aircraft carriers amid ever-increasing demands on the naval fleet.
—Sujita Sinha, Interesting Engineering, 30 Apr. 2026
Such supplements aren't reviewed by the Food and Drug Administration for effectiveness, as a disclaimer on the website notes.
—Kathryn Watson, CBS News, 30 Apr. 2026
The point is to suss out which initiatives have the highest impact and greatest cost-effectiveness for a specific site.
—Jasmin Malik Chua, Footwear News, 30 Apr. 2026
Ascend Agency, Sun Sentinel, 4 May 2026
The new data, which are released annually, follow a year of confusion and doubt in some quarters over the safety and effectiveness of vaccines.
—Lisa Schencker, Chicago Tribune, 4 May 2026
There needs to be more data on CARE Court’s implementation and effectiveness.
—Kaitlyn Schallhorn, Oc Register, 4 May 2026
Why Baking Soda Is Best For Grout Like white vinegar, baking soda tends to be a tried-and-true household cleaner for it's effectiveness at removing dirt and grime.
—Ashlyn Needham, Southern Living, 2 May 2026
While its effectiveness at blocking radiation and extremely lightweight nature are the most compelling details of this material, its stretchiness could lend to even more benefits.
—Chelsea Gohd, Space.com, 1 May 2026
This is crucial to maintaining the effectiveness of aircraft carriers amid ever-increasing demands on the naval fleet.
—Sujita Sinha, Interesting Engineering, 30 Apr. 2026
Such supplements aren't reviewed by the Food and Drug Administration for effectiveness, as a disclaimer on the website notes.
—Kathryn Watson, CBS News, 30 Apr. 2026
The point is to suss out which initiatives have the highest impact and greatest cost-effectiveness for a specific site.
—Jasmin Malik Chua, Footwear News, 30 Apr. 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 city should undertake a detailed analysis of the efficacy of its existing affordable housing programs to consider ways to provide more affordable housing.—
David Garrick,
San Diego Union-Tribune,
7 May 2026
-
On Tuesday, The New York Times reported confirmation from the Department of Health and Human Services that the Food and Drug Administration had blocked the publication of studies showing the safety and efficacy of vaccines against COVID-19 and shingles.—
Beth Mole,
ArsTechnica,
6 May 2026
Noun
-
Anunoby’s early exit came hours after Brown lauded his impact.—
Peter Sblendorio,
New York Daily News,
7 May 2026
-
Once again charming viewers with his native Australian accent, the actor remains effortlessly entertaining while using his charisma to neutralize caustic dialogue that would flatten a less likable performer on impact.—
Alison Foreman,
IndieWire,
6 May 2026
Noun
-
That is according to a new analysis, shared exclusively with NPR ahead of its release, by States United Action, a nonprofit that seeks to protect elections and has been tracking candidate positions on the validity of election results since 2022.—
Miles Parks,
NPR,
4 May 2026
-
The team further confirmed its validity by comparing predictions with experimental results across a wide range of material combinations.—
Bojan Stojkovski,
Interesting Engineering,
3 May 2026
Noun
-
What is the importance of drawing this distinction, though?—
Isaac Chotiner,
New Yorker,
7 May 2026
-
Saka’s importance to this Arsenal side cannot be overstated.—
Abdul Rehman,
New York Times,
7 May 2026
Noun
-
No Wolves player scored more than 12 points on a night the Spurs’ swarming defense created too much havoc too allow Minnesota to exploit its advantages in size and strength.—
Jace Frederick,
Twin Cities,
7 May 2026
-
While other safeties have had success with that small frame, the Dolphins must learn if Taaffe has the strength and tackling ability to bring opponents down consistently as the team’s last line of defense on just about every single play.—
Omar Kelly,
Miami Herald,
7 May 2026
Noun
-
The water is colored by the tamarack tree, kind of a root-beer color, which is a beautiful balance to all the greens — and just the metaphorical symbolic significance of it is really profound.—
Mary Divine,
Twin Cities,
9 May 2026
-
That story was told in the studio by Professor Julian Huxley, an evolutionary biologist, who used pickled wildlife specimens and a photograph of a coelacanth to explain the fish’s significance.—
ABC News,
ABC News,
8 May 2026
Noun
-
That’s why Rosengren, UCSD colleagues Thomas Bewley and Ben Hanson, and colleagues at the University of Arizona are investigating rare, low-probability chances for destruction, thereby offering authorities the best advice on when to launch deflection missions.—
New Atlas,
New Atlas,
10 May 2026
-
Two people were killed and two others injured when two vehicles collided head-on Friday evening along a dusty, deserted stretch of road in the Antelope Valley, authorities said.—
Andrew Khouri,
Los Angeles Times,
10 May 2026
Cite this Entry
“Effectiveness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/effectiveness. Accessed 12 May. 2026.
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