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
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Bland was obsessed with religion, but that did not amount to insanity, the prosecutor argued.
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Part of what drew him to the case, Burton said, was that many of the issues relevant then are still relevant today, like the death penalty, the use of the insanity defense, parole and rehabilitation.
Noun
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In an email to Krebs, Valadon claimed that the repo’s commit logs show that GitHub’s default protections against committing secrets—protections designed to protect unwitting or unskilled developers against exactly this kind of stupidness—had been disabled by the repo’s administrator.
Noun
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Is this just a salary dump, or is there a method to the madness for the Wolves?
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Welcome to the Amazon Prime Day 2026 madness!
Noun
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The difference in display thickness could be a clue that one of the two devices has a less visible crease than the other.
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The beef banter just as easily boils down to recipes and preferences in style and thickness of cuts.
Noun
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Light and Breezy One of the many virtues of the ’60s shift is its simplicity.
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The collection expressed an idea of contemporary simplicity, built through precise proportions, evolved materials and a new visual lightness.
Noun
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Which again, highlights the stupidity of allowing these exceptions in the first place.
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Final negotiations on ‘Peace’ are proceeding, subject to ignorance or stupidity getting in its way.
Noun
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Brooks also taught Wilder how to take something funny, push it all the way to the point of absurdity, then keep going.
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The second lady is perhaps the most interesting figure in Trumpworld right now, and certainly the only one who understands the absurdity of it all.
Noun
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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.
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The show’s real villain is mindlessness, in other words.
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Cite this Entry
“Brainlessness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/brainlessness. Accessed 29 Jun. 2026.
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