as in unreasonable
having no basis in reason or fact
an unsubstantiated claim that was thrown out of court
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Recent Examples of unsubstantiated
However, these claims are routinely found to be unsubstantiated conspiracy theories.
—
Cate Charron, IndyStar, 19 Feb. 2026
Doctors should not simply parrot unsubstantiated talking points.
—Dp Opinion, Denver Post, 16 Feb. 2026
Kennedy, 72, the son of onetime attorney general Robert Kennedy, is the nation's top public health official and has drawn bipartisan criticism for his handling of various issues such as vaccines and unsubstantiated links between Tylenol and autism.
—Anna Kaufman, USA Today, 11 Feb. 2026
The former county clerk in Colorado was convicted of multiple crimes for letting someone access data from a secure voting system in an effort to prove unsubstantiated 2020 election conspiracies.
—Alex Gladden, Oklahoman, 10 Feb. 2026
See All Example Sentences for unsubstantiated
Cate Charron, IndyStar, 19 Feb. 2026
Doctors should not simply parrot unsubstantiated talking points.
—Dp Opinion, Denver Post, 16 Feb. 2026
Kennedy, 72, the son of onetime attorney general Robert Kennedy, is the nation's top public health official and has drawn bipartisan criticism for his handling of various issues such as vaccines and unsubstantiated links between Tylenol and autism.
—Anna Kaufman, USA Today, 11 Feb. 2026
The former county clerk in Colorado was convicted of multiple crimes for letting someone access data from a secure voting system in an effort to prove unsubstantiated 2020 election conspiracies.
—Alex Gladden, Oklahoman, 10 Feb. 2026
See All Example Sentences for unsubstantiated
Recent Examples of Synonyms for unsubstantiated
Adjective
-
Pittman said the defense would not be able to show based on the evidence that Gross’ actions before he was shot were unreasonable.—
Emerson Clarridge
Updated March 5,
Fort Worth Star-Telegram,
5 Mar. 2026
-
Breuer listed two city inspectors by name, accusing them of providing unreasonable timelines, intentionally ignoring information provided by Berrada and its right to the appeal, and for entering the property and interfering with repair work.—
Drake Bentley,
jsonline.com,
5 Mar. 2026
Adjective
-
Trailing in most polls to a center-right challenger who has promised to restore Hungary's Western alliances and end its dependence on Russian energy, Orbán has ramped up unfounded accusations that Kyiv and the European Union seek to bankrupt Hungary by forcing it to financially assist Ukraine.—
Arkansas Online,
Arkansas Online,
5 Mar. 2026
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Fears that attacks on Iran could trigger a more widespread world war were unfounded.—
Boston Herald editorial staff,
Boston Herald,
5 Mar. 2026
Adjective
-
Susman Godfrey represented Dominion Voting Systems in its defamation lawsuit against Fox News stemming from baseless allegations about the integrity of the 2020 election that were broadcast by the network.—
Sarah N. Lynch,
CBS News,
3 Mar. 2026
-
The Secretary of State did not provide him an opportunity to address his baseless accusations before rushing to judgment and to the press.—
Olivia Rubin,
ABC News,
26 Feb. 2026
Adjective
-
Both assertions are false, misleading, and entirely unsupported by the record.—
DeJanay Booth-Singleton,
CBS News,
27 Feb. 2026
-
Confidence and Security Online communication carries the weight of uncertainty, so long as one is unsupported by verification systems.—
Daniel Fusch,
USA Today,
26 Feb. 2026
Cite this Entry
“Unsubstantiated.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unsubstantiated. Accessed 13 Mar. 2026.
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