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
Russia’s unsubstantiated claims that NATO is plotting armed provocations against Transnistria could be a pretext for Moscow’s meddling in Moldova, raising concerns about further military aggression in the region.
—
Brendan Cole, MSNBC Newsweek, 25 Sep. 2025
Their reporting is full of unsubstantiated claims and clearly aims at destroying the agency which, at its heart, has provi[ded] education and health care in place where no one else actually wants to work with a group of people that is one of the most vulnerable in the region.
—Benjamin Weinthal, FOXNews.com, 19 Sep. 2025
These are unsubstantiated allegations.
—Sam Gillette, PEOPLE, 19 Sep. 2025
Andrew Caballero-Reynolds / AFP via Getty Images Yet, that has not prevented people from calling for justice for Reed on social media and circulating unsubstantiated allegations regarding his death.
—Daniella Silva, NBC news, 16 Sep. 2025
See All Example Sentences for unsubstantiated
Brendan Cole, MSNBC Newsweek, 25 Sep. 2025
Their reporting is full of unsubstantiated claims and clearly aims at destroying the agency which, at its heart, has provi[ded] education and health care in place where no one else actually wants to work with a group of people that is one of the most vulnerable in the region.
—Benjamin Weinthal, FOXNews.com, 19 Sep. 2025
These are unsubstantiated allegations.
—Sam Gillette, PEOPLE, 19 Sep. 2025
Andrew Caballero-Reynolds / AFP via Getty Images Yet, that has not prevented people from calling for justice for Reed on social media and circulating unsubstantiated allegations regarding his death.
—Daniella Silva, NBC news, 16 Sep. 2025
See All Example Sentences for unsubstantiated
Recent Examples of Synonyms for unsubstantiated
Adjective
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Officers are able to use loitering laws as general warrants to circumvent individuals’ constitutional right to be protected from unreasonable searches and seizures, Wood said.—
Alex Brizee,
Idaho Statesman,
10 Nov. 2025
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The class counsel has argued that objectors are raising either points that were already decided, inappropriate for this forum, or unreasonable to address.—
Daniel Libit,
Sportico.com,
5 Nov. 2025
Adjective
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The start of the trial in Paris comes three months after Brigitte and her husband sued right-wing American podcaster Candace Owens for making similar unfounded allegations about Brigitte's gender on a public platform.—
Rachel Raposas,
PEOPLE,
29 Oct. 2025
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The Lone Star State is no stranger to conspiracy theories – from baseless claims that cloud seeding caused deadly floods last July to unfounded fears that a routine military training exercise in 2015 was a secret plot to impose martial law in Texas and confiscate firearms.—
Dalia Faheid,
CNN Money,
27 Oct. 2025
Adjective
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The papers were studying strokes in animals, and researchers not only found duplicate images but also a lack of follow-up research, another red flag pointing to baseless findings.—
Tom Chivers,
semafor.com,
7 Nov. 2025
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The Lone Star State is no stranger to conspiracy theories – from baseless claims that cloud seeding caused deadly floods last July to unfounded fears that a routine military training exercise in 2015 was a secret plot to impose martial law in Texas and confiscate firearms.—
Dalia Faheid,
CNN Money,
27 Oct. 2025
Adjective
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Research reveals that 43% of young professionals feel isolated or unsupported in figuring out their career paths.—
Allison Danielsen,
Fortune,
26 Oct. 2025
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The state treasurer and the fund’s chief investment officer said in 2014 that the resulting report contained multiple inaccuracies and unsupported allegations.—
William Melhado,
Sacbee.com,
21 Oct. 2025
Cite this Entry
“Unsubstantiated.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unsubstantiated. Accessed 28 Nov. 2025.
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