GROUNDLESS Synonyms: 92 Similar and Opposite Words

groundless

adjective

ˈgrau̇n(d)-ləs

Definition of groundless

as in unreasonable

having no basis in reason or fact please stop making groundless accusations against innocent people fears of a strike proved groundless

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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 groundless China says such allegations are groundless. — Chan Ho-Him, Fortune, 6 May 2026 The former proved ultimately groundless while the latter came to pass, but not until the market was glutted. — Michael Lynch, Forbes.com, 2 Mar. 2026 Lawmakers, judges and other public servants, all under groundless presidential attack. — James D. Zirin, Washington Post, 3 Feb. 2026 Similarly, the course of action that will bring recovery—reviving domestic manufacturing, revitalizing small towns, ensuring fairness for farmers and working people—is not an impossibility that will poison our minds with groundless optimism. — Rosa Lyster, Harpers Magazine, 30 Dec. 2025 See All Example Sentences for groundless

Recent Examples of Synonyms for groundless

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

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

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

Browse Nearby Words

groundings

groundless

groundling

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“Groundless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/groundless. Accessed 19 Oct. 2026.

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Synonyms of groundless

adjective

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