1
as in delusion
a false idea or belief
the once-common fallacy that girls just weren't any good at math
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
2
as in deception
the quality or state of being false
the fallacy of the notion of spontaneous generation was demonstrated by the Dutch naturalist Leeuwenhoek
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of fallacy
The authors’ prescription for how the United States can compete with China—that Washington should think in the same ways Beijing has—rests on a dangerous fallacy.
—
Foreign Affairs, 16 Dec. 2025
Capital was invested in real estate loans predicated on the fallacy that the underlying collateral could only rise in value.
—Edward Lotterman, Twin Cities, 7 Dec. 2025
It’s based on the fallacy of naturalism.
—Christine Baranski, Vogue, 5 Dec. 2025
To be clear, the narrative that American businesses have disappeared from the climate discussion is a fallacy.
—Justin Worland, Time, 14 Nov. 2025
See All Example Sentences for fallacy
Foreign Affairs, 16 Dec. 2025
Capital was invested in real estate loans predicated on the fallacy that the underlying collateral could only rise in value.
—Edward Lotterman, Twin Cities, 7 Dec. 2025
It’s based on the fallacy of naturalism.
—Christine Baranski, Vogue, 5 Dec. 2025
To be clear, the narrative that American businesses have disappeared from the climate discussion is a fallacy.
—Justin Worland, Time, 14 Nov. 2025
See All Example Sentences for fallacy
Recent Examples of Synonyms for fallacy
Noun
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Mitchell, who had religious delusions, had previously worked as a roofer on the family’s house.—
David Faris,
TheWeek,
16 Feb. 2026
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Troublingly, there are unfolding layers of delusion too.—
James Folta,
Literary Hub,
5 Feb. 2026
Noun
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Comte’s feature directorial debut follows Quebec teenager Antoine, who travels to Ghana for a showdown with Kojo, a local gang member, amid an escalating game of deception.—
Etan Vlessing,
HollywoodReporter,
16 Feb. 2026
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The Portage case is different, as the subcontractor and his co-conspirators are accused of deception in their failure to deliver the televisions to warehouses.—
Jim Woods,
Chicago Tribune,
15 Feb. 2026
Noun
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Like any good cocktail, the margarita comes with a twist of myth.—
Ana Gutierrez,
Austin American Statesman,
19 Feb. 2026
-
Yaga is based on the play by Kat Sandler, who serves as the show’s writer and showrunner, and is a contemporary reimagining of the myth of Baba Yaga set in a coastal town.—
Nicole Fell,
HollywoodReporter,
18 Feb. 2026
Noun
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Of course, the retort is that this would be irritating and exasperating to be continually deluged with alerts about AI deceptiveness.—
Lance Eliot,
Forbes.com,
24 Aug. 2025
Noun
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The man is facing a charge of grossly negligent homicide, with state prosecutors in Innsbruck accusing him of making multiple errors, including seeking help too late and not carrying suitable equipment.—
Sophie Tanno,
CNN Money,
19 Feb. 2026
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The poll found that Cornyn, Hunt and Paxton all have a lead over Crockett and Talarico in a hypothetical November matchup, but that their leads are within the poll’s margin of error.—
Eleanor Dearman,
Fort Worth Star-Telegram,
19 Feb. 2026
Noun
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And the safety of inaction is an illusion.—
Brendan Keegan,
Rolling Stone,
18 Feb. 2026
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Lea Haddad's luscious, curly mane no doubt employs some invisible layers to lighten the load, but the overall appearance gives the illusion of the same sharp, heavy-ended finish created by blunt cuts.—
Krista Carter,
InStyle,
17 Feb. 2026
Noun
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The allegations are a mixture of truth, falsehoods and misdirection.—
AJ Willingham,
AJC.com,
11 Feb. 2026
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The images have led to related falsehoods that have spread online in their wake.—
CBS News,
CBS News,
5 Feb. 2026
Cite this Entry
“Fallacy.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/fallacy. Accessed 22 Feb. 2026.
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