as in unreasonable
having no basis in reason or fact
a careful investigation proved that the charges were foundationless
Synonyms & Similar Words
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Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for foundationless
Adjective
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Many of our technologies are built on the not-unreasonable assumption that openness is good, and that more common knowledge is better.—
Joshua Rothman,
New Yorker,
14 Oct. 2025 -
Each side of the issue argues that the other is unreasonable and operating in bad faith.—
Taylor Seely,
AZCentral.com,
9 Oct. 2025
Adjective
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More severe weather events due to global warming may be driving some of the baseless theories, scientists say.—
Stephanie Armour,
CNN Money,
16 Oct. 2025
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The baseless claims against Dominion caused one of its executives to go into hiding in 2020, and led to numerous defamation lawsuits.—
NPR Washington Desk,
NPR,
9 Oct. 2025
Adjective
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Still, the Epstein saga might have gradually faded from the national consciousness, even in spite of the widespread, unfounded belief that his 2019 suicide in a jail cell while awaiting trial was in fact a murder carried out to prevent him from implicating associates in his crimes.—
Miles Klee,
Rolling Stone,
16 Oct. 2025
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The bull’s sheer size and the location of the hunt spawned unfounded rumors that Brooks had committed game violations.—
Natalie Krebs,
Outdoor Life,
15 Oct. 2025
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Cite this Entry
“Foundationless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foundationless. Accessed 21 Oct. 2025.
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