as in unreasonable
having no basis in reason or fact
a careful investigation proved that the charges were foundationless
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for foundationless
Adjective
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There are people who desire to drastically improve the health of our ecosystems who unknowingly struggle with unreasonable expectations.—
Chris McKeown,
Cincinnati Enquirer,
14 Feb. 2026 -
Amid those pressures, many people turn to the comfort of a pet – but the expectations for what dogs can bring to our lives are becoming increasingly unreasonable.—
Margret Grebowicz,
Fortune,
13 Feb. 2026
Adjective
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There are so many reasons to be mad; the mostly baseless and endless attacks on higher education, the dismantling of life-saving research, ICE, the subverting of policy that redresses shameful social harms.—
Wendy Nelson Espeland,
Mercury News,
11 Feb. 2026
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The Talmud teaches that Jerusalem was destroyed not only because of hatred, but because of sinat chinam, baseless hatred fueled by moral absolutism.—
Rabbi Bruce D. Forman,
Sun Sentinel,
10 Feb. 2026
Adjective
-
Mafi, of Garden Grove Unified, suggested that fear isn’t unfounded.—
Andre Mouchard,
Oc Register,
15 Feb. 2026
-
This is spurious and completely unfounded.—
Letters to the Editor,
The Orlando Sentinel,
14 Feb. 2026
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Cite this Entry
“Foundationless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foundationless. Accessed 18 Feb. 2026.
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