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

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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 Speaking to Fox News Digital, Kravetz dismissed assertions that her group relies on DSA tactics, emphasizing that CVPE supporters span the political spectrum. — Louis Casiano, FOXNews.com, 9 Oct. 2026 Multiple individuals within the world of independent film backed up Skolnick’s assertions about his reputation and the wider industry to IndieWire. — Adam B. Vary, IndieWire, 9 Oct. 2026 The way a book has been handled, underlined, and annotated, as well as the creases in the corners of pages, are reminders of this dispute and of the reader’s assertion of ownership that will remain forever on their bookshelves. — Literary Hub, 8 Oct. 2026 At the meeting, Maitland Mayor John Lowndes, a Democrat who is running against Brodeur for the state Senate seat, spoke out against Dorworth’s assertion that the county’s development process was rigged in favor of preserving the rural boundary. — Martin E. Comas, The Orlando Sentinel, 8 Oct. 2026 See All Example Sentences for assertion

Recent Examples of Synonyms for assertion

Noun

The complaint seeks a declaration that DeWine’s executive order is unlawful.

— Michael McCann, Sportico.com, 16 Oct. 2026
His restaurant businesses were outside the bankruptcy, but Trejo said in a court declaration that approximately 90 percent of his income for the tax years at issue came from acting.

— Alison Foreman, IndieWire, 15 Oct. 2026

Definition of declaration

Noun

But Lugo concurred with Teymouri’s argument that the family’s extreme wealth and potential risk of flight required her to set a high bail.

— James Queally, Los Angeles Times, 17 Oct. 2026
The argument is designed to provide cover for the dehumanizing policies of the administration against immigrants and their families.

— Arkansas Online, Arkansas Online, 16 Oct. 2026

Definition of argument

Noun

The claim that Ukraine has halted its strikes on energy sites could not be independently verified, but neither Russian officials nor media have reported Ukrainian attacks on oil refineries since the energy truce was announced.

— HANNA ARHIROVA, Arkansas Online, 14 Oct. 2026
Gilbert shared a post to his Instagram story responding to the outcry from fans of the actor over the weekend, addressing claims that Danny is pro-ICE or supports Shapiro’s politics.

— Payton Turkeltaub, Variety, 13 Oct. 2026

Definition of claim

Noun

But the bold irreverence that drew droves of devoted readers to Jezebel brought contention, too.

— Meredith Maran, Los Angeles Times, 14 Oct. 2026
The fourth team in World Series contention, the Tampa Bay Rays, stands just above the Guardians in payroll at 25th, with about $98 million on the books.

— Isaac Tellechea, CNN Money, 14 Oct. 2026

Definition of contention

Noun

Both could have been considered lapsed Catholics, disillusioned with the church’s position on homosexuality and its insistence that divorcees get an annulment before remarriage.

— Jonathan Bullington, Chicago Tribune, 18 Oct. 2026
The expected lockout, and MLB’s insistence on a salary cap in their CBA proposals, have also cast doubt on what the system will look like next year — whenever the season begins.

— Maddie Lee, Los Angeles Times, 16 Oct. 2026

Definition of insistence

Noun

Fusion equations meet robotics In nuclear fusion research, Google worked with University of Maryland professor Matt Landreman to identify a broader class of counterexamples to Grad’s conjecture, a mathematical hypothesis dating to 1967.

— Neetika Walter, Interesting Engineering, 13 Oct. 2026
That hypothesis stems from earlier research by Geoff Cook, the CEO of Noom, a digital health company that is funding the Wharton study.

— Mary Cunningham, CBS News, 8 Oct. 2026

Definition of hypothesis

Noun

The latest allegations come nearly a year after Richards was granted a five-year restraining order against Phypers following a contentious court battle involving accusations of physical and emotional abuse.

— Christina Dugan Ramirez, FOXNews.com, 15 Oct. 2026
The Delhi agitation centers on allegations that voter lists were manipulated during the Special Intensive Revision exercise.

— Naman Ramachandran, Variety, 15 Oct. 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 19 Oct. 2026.

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Synonyms of assertion

noun

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