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 That assertion may come as a surprise to people in the United States ahead of its 250th anniversary. — Sarah M.s. Pearsall, The Conversation, 2 July 2026 The assertion that forecasts are unnecessary turns out to be false. — Steve Banker, Forbes.com, 1 July 2026 The outlet added a second law enforcement source familiar with the matter confirmed that assertion. — Liza Esquibias, USA Today, 1 July 2026 Wainger also refuted the assertion that Pennel had expected to be arrested. — Pete Grathoff, Kansas City Star, 1 July 2026 See All Example Sentences for assertion

Recent Examples of Synonyms for assertion

Noun

Though brief, Yoon’s martial law declaration plunged South Korea into a political crisis, paralyzing politics and high-level diplomacy while rattling financial markets.

— ABC News, ABC News, 9 July 2026
The city, county and state all issued local emergency declarations in the days following the fire.

— City News Service, Daily News, 8 July 2026

Definition of declaration

Noun

The proceedings were frequently bogged down by arguments over whether certain exhibits could be admitted into evidence and publicly broadcast via a camera in the courtroom.

— Nicki Brown, CNN Money, 11 July 2026
The lawyers will provide their arguments related to the appeal in subsequent court filings.

— Kaitlyn Huamani, Los Angeles Times, 11 July 2026

Definition of argument

Noun

Kunst said there were some undocumented claims of miraculous cures prior to when records of such occurrences would be kept, dating back to the 1950s.

— Vivian Wilson, Twin Cities, 8 July 2026
All claims were dismissed, and a hearing will be held on July 29 and 30 to hear arguments on any points of dispute.

— Janine Henni, PEOPLE, 7 July 2026

Definition of claim

Noun

This contradiction is a cause for contention in much of Western Europe.

— Katharina Buchholz, Forbes.com, 7 July 2026
Miles eventually gets pulled into the local chapter of the Jeremiah Wylkes Society, whose mission is to investigate its 19th-century namesake’s contention that there is a hidden entrance to a spectacular underworld nearby.

— Heller McAlpin, Christian Science Monitor, 7 July 2026

Definition of contention

Noun

In the majority’s view, this must be read broadly to achieve the declaration’s insistence on rights and equality.

— Morgan Marietta, The Conversation, 30 June 2026
Steve Tew, district attorney for Ouachita and Morehouse parishes, has never wavered in his insistence that Duncan was guilty of murder and that he should be put to death.

— Richard A. Webster, ProPublica, 29 June 2026

Definition of insistence

Noun

King took a DNA test in May after prosecutors introduced the allegation in court filings, causing his trial to be delayed.

— Lillie Davidson, Fort Worth Star-Telegram, 10 July 2026
Attorneys for the building’s defendants have denied the allegations in court filings and any liability for the accident, and have filed a third-party complaint against the construction company that employed Rojas.

— Emma Tucker, CNN Money, 9 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 12 Jul. 2026.

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Synonyms of assertion

noun

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