Definition of substantiatenext
1
as in to prove
to gain full recognition or acceptance of substantiated his claim to local mountaineering fame with a photo of himself on the summit of Mount McKinley

Synonyms & Similar Words

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Antonyms & Near Antonyms

2
3
as in to embody
to represent in visible form the artist's intense feelings are substantiated by his paintings' bold colors and broad brush strokes

Synonyms & Similar Words

4
5
as in to reinforce
to provide evidence or information for (as a claim or idea) Darwin spent the rest of his life gathering evidence to substantiate his theory of the origin of species

Synonyms & Similar Words

Antonyms & Near Antonyms

Synonym Chooser

How does the verb substantiate contrast with its synonyms?

Some common synonyms of substantiate are authenticate, confirm, corroborate, validate, and verify. While all these words mean "to attest to the truth or validity of something," substantiate implies the offering of evidence that sustains the contention.

the claims have yet to be substantiated

When is authenticate a more appropriate choice than substantiate?

Although the words authenticate and substantiate have much in common, authenticate implies establishing genuineness by adducing legal or official documents or expert opinion.

handwriting experts authenticated the diaries

When might confirm be a better fit than substantiate?

The meanings of confirm and substantiate largely overlap; however, confirm implies the removing of doubts by an authoritative statement or indisputable fact.

confirmed the reports

In what contexts can corroborate take the place of substantiate?

While the synonyms corroborate and substantiate are close in meaning, corroborate suggests the strengthening of what is already partly established.

witnesses corroborated his story

When could validate be used to replace substantiate?

While in some cases nearly identical to substantiate, validate implies establishing validity by authoritative affirmation or by factual proof.

validated the hypothesis by experiments

When would verify be a good substitute for substantiate?

The words verify and substantiate can be used in similar contexts, but verify implies the establishing of correspondence of actual facts or details with those proposed or guessed at.

all statements of fact in the article have been verified

Example Sentences

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 substantiate The findings of that report haven’t been publicized, but several of the allegations were substantiated, while others were not, according to Boggie’s lawsuit. Alex Brizee, Idaho Statesman, 10 June 2026 Trump, without substantiating, claimed that the FBI actually ushered rioters inside the Capitol and that the individuals only pleaded guilty out of fear of getting harsher sentences. Chad De Guzman, Time, 8 June 2026 While those allegations were never substantiated, Frey said investigators found that O'Hara had interfered with the probe. ABC News, 27 May 2026 That case was settled and dismissed, and an independent investigation found that those claims could not be substantiated. East Bay Times Editorial, Mercury News, 26 May 2026 See All Example Sentences for substantiate
Recent Examples of Synonyms for substantiate
Verb
  • None of the allegations in the Georgia lawsuit have been proven in court, and the defendants have yet to file responses to the complaint.
    Zachary Bynum, CBS News, 26 June 2026
  • The firms asked the judge to dismiss the case Wednesday, arguing Uber had failed to prove fraud.
    Rebecca Ellis, Los Angeles Times, 26 June 2026
Verb
  • Cellphone video verified by NBC News shows someone in fatigues-style clothing appearing to exchange rounds with police.
    Mirna Alsharif, NBC news, 22 June 2026
  • Astronomers could now search the cosmos for such events, the discovery of which would help verify Fuller's model.
    Robert Lea, Space.com, 22 June 2026
Verb
  • Wandering markets, eating at food stalls, sitting among locals and fellow travelers at the restaurants that embody a city.
    Los Angeles Times, Los Angeles Times, 24 June 2026
  • Cristiano Ronaldo, 41, continues to defy time at the World Cup, embodying the finite nature of elite careers.
    Clemente Lisi, Forbes.com, 23 June 2026
Verb
  • However, command issues and inconsistency prevented him from establishing a permanent role.
    Peter Chawaga, Forbes.com, 21 June 2026
  • These types of commissions, which have facilitated significant improvements in other states’ public defender systems, are usually established by the governor.
    Anat Rubin, Los Angeles Times, 21 June 2026
Verb
  • Ukraine’s most important innovation may be its ability to integrate tactical drones, operational strike systems, strategic drone campaigns, artillery, aircraft and conventional ground forces into a mutually reinforcing system.
    Hunter LaCroix, Baltimore Sun, 20 June 2026
  • For Edwards, the reaction reinforced why authentic storytelling matters more than ever, especially in her field of work.
    Tereza Shkurtaj, PEOPLE, 20 June 2026
Verb
  • Ukraine’s ability to strike military production facilities, fuel depots, ammunition storage sites and critical infrastructure hundreds of miles from the front lines has demonstrated a remarkable evolution in its strategic capabilities.
    Hunter LaCroix, Baltimore Sun, 20 June 2026
  • To earn belief, leaders must protect early adopters, welcome critical feedback, and demonstrate value through real-world examples.
    Julie Averill, Forbes.com, 20 June 2026
Verb
  • The destroyer commissioned Tuesday, the Choe Hyon, is expected to have anti-ship and land-attack missile capabilities, although neither can be confirmed to date, analysts said.
    Brad Lendon, CNN Money, 24 June 2026
  • Immigration attorney Morella Aguado, who is not involved in Avila's case, confirmed one of her clients was also transferred out of Krome.
    Ivan Taylor, CBS News, 24 June 2026
Verb
  • Some council members also expressed enthusiasm for developing a battery storage system at last week’s council meeting.
    Carolyn Stein, Chicago Tribune, 27 June 2026
  • Residents have expressed interest in testing for more contaminants.
    Mack Baysinger Follow, Los Angeles Times, 27 June 2026

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Cite this Entry

“Substantiate.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/substantiate. Accessed 28 Jun. 2026.

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