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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Pittman said the defense would not be able to show based on the evidence that Gross’ actions before he was shot were unreasonable.—
Emerson Clarridge
Updated March 5,
Fort Worth Star-Telegram,
5 Mar. 2026 -
Breuer listed two city inspectors by name, accusing them of providing unreasonable timelines, intentionally ignoring information provided by Berrada and its right to the appeal, and for entering the property and interfering with repair work.—
Drake Bentley,
jsonline.com,
5 Mar. 2026
Adjective
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The Secretary of State did not provide him an opportunity to address his baseless accusations before rushing to judgment and to the press.—
Olivia Rubin,
ABC News,
26 Feb. 2026
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The cost of fighting these baseless lawsuits is so high that, most often, a settlement becomes the only rational option.—
Nick Payzant,
Oc Register,
25 Feb. 2026
Adjective
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Connecticut needs regulations that reflect the economic and biological reality of 2026, not unfounded fears of the past.—
Rino Ferrarese,
Hartford Courant,
27 Feb. 2026
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The fears are not unfounded, according to staff attorney Lisa Femia of the Electronic Frontier Foundation.—
Ryan Macasero,
Mercury News,
26 Feb. 2026
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Cite this Entry
“Foundationless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foundationless. Accessed 9 Mar. 2026.
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