ASSERTION Synonyms: 52 Similar and Opposite Words

assertion

noun

ə-ˈsər-shən

Definition of assertion

as in declaration

a solemn and often public declaration of the truth or existence of something the assertion that all men have certain unalienable rights is set forth in the Declaration of Independence

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in argument

an idea or opinion that is put forth in a discussion or debate made the unlikely assertion that gravity affects light

Synonyms & Similar Words

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 assertion The finding challenged the firm's assertion that such contracts qualify as financial instruments policed by the federal government. — Max Zahn, ABC News, 3 Sep. 2026 The question is what, if anything, the team can do about those assertions. — Tom Tapp, Deadline, 2 Sep. 2026 Some Democrats fear Trump could use those unsubstantiated assertions as a pretext to intervene in November. — Susan Page, USA Today, 1 Sep. 2026 Stepping into the public sphere rather than retreating became both a survival strategy and a refuge—an assertion of political and artistic self-determination. — Elisa R. Linn, Artforum, 1 Sep. 2026 See All Example Sentences for assertion

Recent Examples of Synonyms for assertion

Noun

Following the mistrial declaration, some legal experts suggested that the prosecution aimed too high in charging Clancy with first-degree murder, noting a lower charge, such as second-degree murder or manslaughter, might have won over the jury.

— Emily Hallas, The Washington Examiner, 4 Sep. 2026
And today, one morning of high anticipation as Judge William Sullivan moved toward a mistrial declaration, then allowed Lindsay Clancy’s attorney one hour to file a last-ditch appeal request.

— Yasmin Vossoughian, NBC news, 4 Sep. 2026

Definition of declaration

Noun

The earliest arguments for the non-existence of time go back to the pre-Socratic Greek philosopher, Parmenides of Elea, in southwest Italy, who flourished in the fifth century BCE.

— Literary Hub, Literary Hub, 4 Sep. 2026
The central legal argument made by the petitioners revolved around the Kansas Public Speech Protection Act, a law designed to safeguard the constitutional rights of a person to petition and prevent lawsuits that silence public participation.

— Cuyler Dunn, Kansas City Star, 4 Sep. 2026

Definition of argument

Noun

When approached for comment by The Athletic, DHS disputed Pourrain’s claims about the facility’s conditions.

— Felipe Cardenas, New York Times, 9 Sep. 2026
Rudin had stepped away from producing in 2021, after a Hollywood Reporter story detailed multiple claims from Rudin’s former employees of bullying and verbal abuse as well as throwing objects at staff.

— Caitlin Huston, HollywoodReporter, 8 Sep. 2026

Definition of claim

Noun

The Falcons’ season begins this weekend; one that most are considering an evaluation year with an outside chance at playoff contention in a weak division.

— Gabriel Burns, AJC.com, 9 Sep. 2026
No journey from a rebuild into a contention window happens without hardship.

— Spencer Nusbaum, New York Times, 9 Sep. 2026

Definition of contention

Noun

Her music revealed a profound belief in the goodness of others and a witty, fiery insistence on remaining true to herself.

— Daniel Kreps, Rolling Stone, 30 Aug. 2026
Despite Bret’s passionate insistence that his classmate is a serial killer, Croft tells him Robert is a good kid from a good family and sends him back to class.

— Louis Peitzman, Vulture, 27 Aug. 2026

Definition of insistence

Noun

But by Friday evening, when Elsinore had its world premiere in Telluride, I was forced to revise my hypothesis.

— Scott Feinberg, HollywoodReporter, 5 Sep. 2026
Moran plans to put that hypothesis to the test in about a month in a clinical trial for patients with colorectal, breast, and head and neck cancers who are undergoing chemotherapy.

— Jackie Flynn Mogensen, Scientific American, 3 Sep. 2026

Definition of hypothesis

Noun

The tampering allegation in question centers on Luke Ferrelli, a linebacker who transferred from Cal to Clemson in the offseason.

— Matt Baker, New York Times, 3 Sep. 2026
The allegations kicked off a near year-long independent investigation by the NBA—conducted by law firm Wachtell, Lipton, Rosen & Katz.

— Joshua Hong, Fortune, 3 Sep. 2026

Definition of allegation

Browse Nearby Words

asserting

assertion

assertions

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Style

“Assertion.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/assertion. Accessed 10 Sep. 2026.

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Synonyms of assertion

noun

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