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 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 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 See All Example Sentences for groundless

Recent Examples of Synonyms for groundless

Adjective

Your expectations of your stepsons aren’t unreasonable at all.

— R. Eric Thomas, Mercury News, 27 Aug. 2026
If the prosecution’s version of the evidence is reasonable and the defense’s is unreasonable, then that is not reasonable doubt.

— Christine Pelisek, PEOPLE, 25 Aug. 2026

Definition of unreasonable

Adjective

According to the popular—and scientifically baseless—myth, daddy longlegs spiders are among the most venomous spiders, but their fangs are too short to bite humans.

— Melissa Petruzzello, Encyclopedia Britannica, 2 Sep. 2026
Towers said that concerns about consent and explanation of risk are baseless.

— Amy Yurkanin, ProPublica, 24 Aug. 2026

Definition of baseless

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groundings

groundless

groundling

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“Groundless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/groundless. Accessed 4 Sep. 2026.

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Synonyms of groundless

adjective

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