1
as in insanity
lack of good sense or judgment
had the inexplicable brainlessness to sell his car for half of what it was worth
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
2
as in stupidness
the quality or state of lacking intelligence or quickness of mind
the turkey is one bird that has often been cited for its brainlessness
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for brainlessness
Noun
-
Reiner’s lawyers may plead insanity as part of his defense in connection with a long history of drug use and other mental health disorders.—
Brian Welk,
IndieWire,
23 Feb. 2026 -
Los Angeles entertainment and trial lawyer Tre Lovell tells USA TODAY that Reiner will likely plead not guilty by reason of insanity.—
Anna Kaufman,
USA Today,
23 Feb. 2026
Noun
-
Sopho derives from the Greek word for wisdom, mania from the Greek word for madness.—
Scott Lafee,
San Diego Union-Tribune,
24 Feb. 2026
-
With all the madness going on out there, this is exactly the game the world needs right now.—
Sean Williams,
Harpers Magazine,
24 Feb. 2026
Noun
-
That is the same thickness as an iPhone 17 Pro Max.—
Arjun Kharpal,
CNBC,
1 Mar. 2026
-
The rotors are smooth and within thickness tolerance.—
Hartford Courant,
Hartford Courant,
28 Feb. 2026
Noun
-
California’s Napa Valley is prized for its vineyard views and quiet country roads, which create a relaxed atmosphere that blends rural simplicity with polished sophistication.—
Demetrius Simms,
Robb Report,
24 Feb. 2026
-
Ohtani shortened the name to Decoy for simplicity.—
Ryan Brennan,
Charlotte Observer,
24 Feb. 2026
Noun
-
Any who show up are declaring their indelible stupidity and misogyny.—
Gil Kaufman,
Billboard,
24 Feb. 2026
-
As to the famous fine line between stupid and clever, the stupidity and the cleverness are all but inextricable, and to the point.—
Television Critic,
Los Angeles Times,
20 Feb. 2026
Noun
-
The work makes this absurdity plain.—
Anel Rakhimzhanova,
Artforum,
1 Mar. 2026
-
This lack of scientific alignment leads to absurdities.—
Rino Ferrarese,
Hartford Courant,
27 Feb. 2026
Noun
-
There’s the White House and its malicious megaphone of mindlessness; the generative AI advocates and their pushy, pathetic ploys; the Major League Baseball owners and their dedication to self-destruction.—
Ben Travers,
IndieWire,
20 Feb. 2026
-
The show’s real villain is mindlessness, in other words.—
Shirley Li,
The Atlantic,
5 Feb. 2026
Noun
-
Unlike its sibling concepts of dumbness and idiocy, stupidity isn’t really a personality trait.—
Jonny Thomson,
Big Think,
11 Feb. 2026
-
Compare that to punk rock, which used dumbness as a tactic.—
Arkansas Online,
Arkansas Online,
14 Aug. 2025
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Cite this Entry
“Brainlessness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/brainlessness. Accessed 4 Mar. 2026.
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