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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Example Sentences

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

On the surface, paying as low as 24 cents for an hour of streaming game time doesn’t sound completely unreasonable.

— Kyle Orland, ArsTechnica, 21 Oct. 2026
If Putin rejects the framework — or, more likely, demands unreasonable changes — then the world will at least know who blocked the fledgling peace effort.

— David Ignatius, Washington Post, 21 Oct. 2026

Definition of unreasonable

Adjective

The Republican accused Bradley of lying about the circumstances of her absence, an allegation Bradley’s campaign said was unfounded.

— Mary Ramsey, Charlotte Observer, 16 Oct. 2026
The pullback isn't totally unfounded given the problems in its medical devices business.

— Kevin Stankiewicz, CNBC, 13 Oct. 2026

Definition of unfounded

Adjective

Trump unleashed a series of personal and baseless attacks against Hamilton at the rally in Park City, Kansas -- about 10 miles north of Wichita -- with just two weeks out from election day as the balance of power in the Senate hangs in the balance.

— ABC News, ABC News, 20 Oct. 2026
The White House has consistently derided Bonta’s litigation against the administration as baseless and misguided.

— Kevin Rector, Los Angeles Times, 15 Oct. 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 27 Oct. 2026.

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Synonyms of groundless

adjective

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