as in evidence
something presented in support of the truth or accuracy of a claim
the signature of a witness provides substantiation that a person's will is genuine
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Recent Examples of substantiation
Courts have consistently ruled that failure to comply with substantiation rules leads to disallowance, no matter how genuine the donation.
—
Matthew F. Erskine, Forbes.com, 9 Sep. 2025
Trump’s post did not include any substantiation for his claims.
—Alicia Wallace, CNN Money, 24 Aug. 2025
Matthew F. Erskine, Forbes.com, 9 Sep. 2025
Trump’s post did not include any substantiation for his claims.
—Alicia Wallace, CNN Money, 24 Aug. 2025
Recent Examples of Synonyms for substantiation
Noun
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In many cases, those determinations simply cannot be made until court cases begin, and evidence relating to the suspect's background and planning are publicly available.—
NPR,
NPR,
25 Oct. 2025
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Furthermore, when colonizers attempted to burn all evidence of Nkrumah’s time as a revolutionary leader, Hesse snuck his reels out of Ghana, and into a London vault, where the footage has spent decades inside, waiting to be digitized.—
Marcus Jones,
IndieWire,
25 Oct. 2025
Noun
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Chromophoric proof concept The team harnessed enzymes to generate acetyllysine inside cells, then incorporated it into proteins at specific sites.—
Neetika Walter,
Interesting Engineering,
24 Oct. 2025
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All one needs to do is look at the GMC Syclone for ample proof.—
Bryan Hood,
Robb Report,
24 Oct. 2025
Noun
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The speakers offer special sermons dedicated to detainees, testimonies from family members of people being detained or personal stories.—
Miami Herald,
Miami Herald,
24 Oct. 2025
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Harvick and Byers’ testimony comes after Perry found in a separate case that Homeland Security’s account of events in the city was not reliable.—
Kinsey Crowley,
USA Today,
24 Oct. 2025
Noun
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Comparable in size to the Arc de Triomphe, the Porte Monumentale also contained surface ornamentation based on Haeckel’s exacting lifelong documentation of organisms to be found in the world’s oceans.—
Literary Hub,
Literary Hub,
28 Oct. 2025
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Be sure to also provide them with your confirmation number, flight details, seat number, and any supporting documentation.—
Lauren Dana Ellman,
Travel + Leisure,
28 Oct. 2025
Cite this Entry
“Substantiation.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/substantiation. Accessed 31 Oct. 2025.
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