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 several individually reasonable events, viewed together and over time, can tell an unreasonable story.

— Shahen Minasyan, Forbes.com, 24 Sep. 2026
At the outset of the Biden administration in January 2021, NASA was still targeting a 2024 lunar landing, even though this was widely seen as unreasonable.

— Eric Berger, ArsTechnica, 23 Sep. 2026

Definition of unreasonable

Adjective

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
Supporters of the three men said the allegations were baseless and contradicted by documentary evidence.

— ABC News, ABC News, 23 Sep. 2026

Definition of baseless

Adjective

Thankfully, my worries turned out to be unfounded, because the talent show in this episode turns out to be her time to shine.

— Tom Smyth, Vulture, 28 Sep. 2026
An investigator later determined that Iv’s complaint against Plessy Cloud was unfounded, documents obtained by the Courant show.

— Helen I. Bennett, Hartford Courant, 25 Sep. 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 4 Oct. 2026.

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Synonyms of foundationless

adjective

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