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

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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 Clippers’ assertion came after ESPN reported two key points regarding the NBA’s ongoing investigation into how Kawhi Leonard was compensated during his tenure with the team. — Michael McCann, Sportico.com, 20 Aug. 2026 Culture Minister Isaac Tchiakpé rejected RSF’s assertion that the filmmakers had received authorization from his ministry to carry out the documentary shoot. — ABC News, 20 Aug. 2026 Several days later, two lawyers issued a statement disputing that assertion. — Emily R. Condon, USA Today, 19 Aug. 2026 Contrary to Representative Gomez's assertion in his statement, his actions were not 'consensual in nature' with respect to our client. — Caitlin Yilek, CBS News, 19 Aug. 2026 See All Example Sentences for assertion

Recent Examples of Synonyms for assertion

Noun

Indiana's approval for a major disaster declaration came through earlier this week.

— Lauren Victory, CBS News, 28 Aug. 2026
Senate task force staff have a list of roughly 100 possible threats, including the prospect of a national election emergency declaration from the White House and the presence of federal troops and law enforcement at polling locations.

— Eric McDaniel, NPR, 28 Aug. 2026

Definition of declaration

Noun

This turns into a big argument about Issa being a weird little guy, and suddenly there are multiple potential roommate schisms in the house.

— Ben Rosenstock, Vulture, 28 Aug. 2026
Computer science emerged as a distinct academic discipline in the following decades, when the research traditions of math and engineering came together, and arguments about the nature of the new field soon followed.

— Ben Brubaker, Quanta Magazine, 28 Aug. 2026

Definition of argument

Noun

Thirteen days before Morissette’s lawsuit, Urinov filed her own claim against the singer in London’s King Bench Division, which handles cases of defamation, misuse of private information, data protection, and harassment by publication.

— Kathleen Perricone, Entertainment Weekly, 2 Sep. 2026
Two supertankers carrying Saudi oil were struck on Monday, undermining the White House’s claims that the Strait of Hormuz is safe for navigation.

— Brendan Ruberry, semafor.com, 1 Sep. 2026

Definition of claim

Noun

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
The right-wing theological website Protestia has attacked Hamilton for not heeding Paul’s insistence that women stay silent in church.

— Bill McKibben, New Yorker, 26 Aug. 2026

Definition of insistence

Noun

Until then, readers should take these issues as interesting hypotheses and case discussions.

— Steve Denning, Forbes.com, 31 Aug. 2026
Data from the Forest Service tentatively confirms Finch’s hypothesis, suggesting that kudzu occupies around 227,000 acres of Southern land, just a small fraction of the millions of acres it has been said to cover.

— The Editors, JSTOR Daily, 26 Aug. 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 4 Sep. 2026.

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Synonyms of assertion

noun

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