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

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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 Beyond questions of due process, Kelly also challenged the administration's assertion that its actions were based on professional journalistic standards rather than coverage the president dislikes. — Melissa Quinn, CBS News, 8 Oct. 2026 This assertion strains logic and factual reality to the breaking point. — Kit Chellel, Fortune, 5 Oct. 2026 Some requests were for DeepSeek’s technology, a finding that bolsters assertions from Congress that the company is in bed with the CCP’s military and spying apparatus. — Hudson Crozier, The Washington Examiner, 3 Oct. 2026 This study gives us a reason, beyond the assertions of law enforcement leaders, to believe the Flock system deserves some credit for San Francisco's drop in car thefts. — Greg Rosalsky, NPR, 2 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

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 17 Oct. 2026.

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Synonyms of assertion

noun

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