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 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 Secretary Kennedy’s team seeks to make autism compensable under vaccine-injury rules, turning diagnoses into groundless lawsuits while draining resources from real causes and care. — Tom Frieden, Scientific American, 21 Nov. 2025 Earlier this week, Sulton said the new criminal case is groundless and accused prosecutors of bringing additional charges because Spencer rejected a plea deal on the first case. — Vanessa Swales, jsonline.com, 17 Oct. 2025 See All Example Sentences for groundless

Recent Examples of Synonyms for groundless

Adjective

The standard is very low, and that is 'more probable than not' that this child may have been put in an unreasonable risk of harm.

— Erin Moriarty, CBS News, 9 Aug. 2026
In such an environment, Fundstrat’s Tom Lee has argued that the S & P 500 can climb to 8,000 over the next few weeks, a level that is not too unreasonable given that the broader index was last trading around 7,750 — only 3% away.

— Sarah Min, CNBC, 7 Aug. 2026

Definition of unreasonable

Adjective

These fears, while unfounded, were indicative of something much worse—and marked a new, ominous chapter in the whale’s evolving symbolic import.

— Naomi Skwarna, hazlitt.net, 13 Aug. 2026
Experts say these concerns are largely unfounded, but the conversation is bringing to light misconceptions about testosterone and masculinity.

— Sara Moniuszko, USA Today, 13 Aug. 2026

Definition of unfounded

Adjective

Judge Lebovits ruled in favor with the Times according to New York State’s Anti-SLAPP law, which protects against baseless legal proceedings stemming from attempts to stifle the press or free speech.

— Fran Hoepfner, Vulture, 28 July 2026
Trump’s narrow loss in Arizona in 2020 and his subsequent — and baseless — insistence that fraud accounted for the defeat has fueled an election denialism that Arizona voters have rarely rewarded.

— Arizona Republic, AZCentral.com, 21 July 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 15 Aug. 2026.

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Synonyms of groundless

adjective

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