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 Raper ruled that the meaning was not defamatory, finding that an assertion that someone had changed their story would not necessarily cause an ordinary reasonable person to think less of them. — Naman Ramachandran, Variety, 22 July 2026 The assertion was intended to clear up confusion that began swirling over the weekend around a false positive test from the Food and Drug Administration—which Taylor Farms celebrated, sparking confusion. — Beth Mole, ArsTechnica, 21 July 2026 Numerous analysts, conservative and liberal, have contradicted these assertions. — The Christian Science Monitor, Christian Science Monitor, 20 July 2026 Officials provided no evidence to support the administration’s assertion that the pool was vandalized. — Maura Judkis, Washington Post, 16 July 2026 See All Example Sentences for assertion

Recent Examples of Synonyms for assertion

Noun

In dozens of declarations collected as part of the court record, detainees recounted broccoli full of worms, diapers doled out one at a time, and staff tearing up children’s drawings.

— Sonja Sharp, Los Angeles Times, 24 July 2026
Worker Keyanna Campbell said in a declaration that on her production line, Black workers were singled out for the most strenuous tasks.

— Ethan Baron, Mercury News, 24 July 2026

Definition of declaration

Noun

Many experts acknowledge there are legitimate arguments for using cloning in conservation, and for gene selection in farming.

— Jessie Yeung, CNN Money, 25 July 2026
Final efforts to spare his life After Andres’ death verdict, several Death Row inmates sung Andres’ praises in his Spencer hearing, where his attorneys presented final arguments in the hopes of saving Andres from the death penalty.

— Grethel Aguila, Miami Herald, 24 July 2026

Definition of argument

Noun

The claim and counterclaim are among serious allegations – including of smear campaigns and embezzlement – aired in multiple court cases now swirling around the production of the Australian musical comedy.

— Hilary Whiteman, CNN Money, 22 July 2026
During years of low claim usage, or good years, the savings generated are enjoyed by the carrier.

— Kumar Rupesh, Forbes.com, 21 July 2026

Definition of claim

Noun

The Philadelphia Phillies entered the second half of the season firmly in the National League playoff race, while arguably their biggest division rival, the New York Mets, are virtually out of contention.

— Peter Chawaga, Forbes.com, 22 July 2026
For the first time, non-English-language films in this year’s Platform section now have a direct path to Best International Feature Film Oscar contention, making Toronto only one of six international film festivals to qualify.

— Ryan Lattanzio, IndieWire, 21 July 2026

Definition of contention

Noun

From the outset, the foundation was shaped by his authentic interest in supporting AIDS research and his insistence on listening to people with lived experience of the epidemic, Aslett said.

— ABC News, ABC News, 24 July 2026
And a crypto market structure bill is snagged over Democrats’ insistence over ethics rules for the president.

— Burgess Everett, semafor.com, 23 July 2026

Definition of insistence

Noun

Purchase data confirmed a hypothesis that conventional epidemiology had to generate first, which is useful and which is a different job from finding the vendor.

— John Drake, Forbes.com, 22 July 2026
For a long time, our leading hypothesis was bullying and violence, but that may be a bit impractical, given their kingdoms are vast networks of tunnels that can stretch for up to three kilometers.

— Jacek Krywko, ArsTechnica, 21 July 2026

Definition of hypothesis

Noun

Lovell said police would treat an allegation like any other crime.

— Becca Savransky, Idaho Statesman, 24 July 2026
Saulter reported the allegations to the Texas Rangers, and was placed on administrative leave a short time later, according to testimony at the trial.

— Harriet Ramos, Fort Worth Star-Telegram, 24 July 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 29 Jul. 2026.

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Synonyms of assertion

noun

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