FOUNDATIONLESS Synonyms: 92 Similar and Opposite Words

foundationless

adjective

Definition of foundationless

as in unreasonable

having no basis in reason or fact a careful investigation proved that the charges were foundationless

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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of foundationless Buying a foundationless house is not the only real-estate mistake Handler has made. — Kim Velsey, Curbed, 11 Mar. 2026

Recent Examples of Synonyms for foundationless

Adjective

But Michael Edney, who worked at the OLC under Bush, said the opinion’s reading of executive privilege was not unreasonable, given the importance that some presidents place on outside consultation.

— Perry Stein, Washington Post, 18 Oct. 2026
Both sides have accused each other of being unreasonable and of ignoring practical concerns about voting and election security, though in very different ways.

— Kevin Rector, Los Angeles Times, 17 Oct. 2026

Definition of unreasonable

Adjective

Trump’s obsession with baseless election fraud claims and threats to rig or militarize our elections won’t help the recent college grad who’s sent out 300 resumes but can’t get a job.

— S.E. Cupp, New York Daily News, 8 Oct. 2026
Homeland Security Secretary Markwayne Mullin publicly claimed in July — without providing evidence — that there may be more than 190,000 such voters on California rolls, a claim California officials dismissed as baseless.

— Kevin Rector, Los Angeles Times, 29 Sep. 2026

Definition of baseless

Adjective

The pullback isn't totally unfounded given the problems in its medical devices business.

— Kevin Stankiewicz, CNBC, 13 Oct. 2026
Its inclusion in the documentary has provided ammunition for Musk supporters and his lawyers to discredit the film, pointing to an unfounded conspiracy theory about SpaceX’s Starlink satellites interfering in the election.

— ABC News, ABC News, 12 Oct. 2026

Definition of unfounded

Adjective

Ye Khaung Kyaw and the two other men charged in connection with the case have said the accusations against them are groundless.

— Arkansas Online, Arkansas Online, 24 Sep. 2026
Social media in South Korea have been filled with messages stoking fears about safety on Jeju, with some spreading groundless rumors and deriding the island.

— Hyung-Jin Kim, Los Angeles Times, 27 Aug. 2026

Definition of groundless

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foundation

foundationless

foundations

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“Foundationless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foundationless. Accessed 20 Oct. 2026.

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Synonyms of foundationless

adjective

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