ASSUMPTION Synonyms: 137 Similar and Opposite Words

assumption

noun

ə-ˈsəm(p)-shən

Definition of assumption

as in theory

something taken as being true or factual and used as a starting point for a course of action or reasoning the widespread assumption that violent entertainment leads to violent behavior in children your argument is faulty because it's based on erroneous assumptions

Synonyms & Similar Words

Relevance

as in arrogance

an exaggerated sense of one's importance that shows itself in the making of excessive or unjustified claims his air of assumption tended to put people off rather quickly

Synonyms & Similar Words

Antonyms & Near Antonyms

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 assumption The guarantees apply only to specific properties, inputs, and assumptions described in each proof. — Aamir Khollam, Interesting Engineering, 22 Oct. 2026 But by the end of the film, Seyfried begins pushing Fielder on his allegiances and assumptions. — Kathryn Vanarendonk, Vulture, 22 Oct. 2026 The official said Salvadorean authorities were operating under the assumption that the four missing Salvadoreans are still alive. — ABC News, 22 Oct. 2026 Throughout the course of the campaign, candidates are making assumptions. — Ted Johnson, Deadline, 21 Oct. 2026 See All Example Sentences for assumption

Recent Examples of Synonyms for assumption

Noun

Pike didn’t always have such a cogent theory of the power of the body in performance.

— Sarah Crompton, Vogue, 21 Oct. 2026
The idea that the absence of private property and systematic inequality automatically removes coercion—which forms the core of the Marxist theory of history—is not proven.

— Literary Hub, Literary Hub, 21 Oct. 2026

Definition of theory

Noun

McVay and Snead have effectively built a culture of arrogance.

— Los Angeles Times, Los Angeles Times, 24 Oct. 2026
These fascinating, illuminating episodes raise the question of whether great fiction requires the kind of single-mindedness and even arrogance that McCarthy cultivated.

— New York Times, New York Times, 8 Oct. 2026

Definition of arrogance

Noun

The song is a dreamy barn-raiser, hoisting this premise on warm guitar tones and a plaintive tone that proves a through-line throughout the record.

— Linnie Greene, Pitchfork, 20 Oct. 2026
Instead, Brammall and Dyer came close to substituting Colin with an elderly lady, before reverting to their original premise.

— Jesse Whittock, Deadline, 20 Oct. 2026

Definition of premise

Noun

Tampa Bay used clear superiority in its starting rotation, bullpen and late-series offense to eliminate Cleveland.

— ABC News, ABC News, 19 Oct. 2026
If military superiority alone could end wars, then Afghanistan and Iraq would have been relatively easy American wins.

— Anna Mulrine Grobe, Christian Science Monitor, 16 Oct. 2026

Definition of superiority

Noun

Consistent with their hypothesis, the secretion signal helps transfer the enzyme out of the cell, while the lipid anchor holds it near the cell surface.

— Muskan Bhatia, Interesting Engineering, 21 Oct. 2026
But there are indirect consequences of the Many Worlds hypothesis that could lend the idea credibility.

— Philipp Strasberg, Scientific American, 20 Oct. 2026

Definition of hypothesis

Noun

Above 5%, however, attitudes began to shift and yields suddenly starting looking like an attractive entry point, compensating even for the risk of inflation above 3%.

— Fred Imbert,Sean Conlon,Hugh Leask, CNBC, 22 Oct. 2026
The underlying racial attitudes have persisted, Chapel said, contributing to present-day inequalities such as Black infant mortality.

— Kansas City Star, Kansas City Star, 21 Oct. 2026

Definition of attitude

Noun

The exhibition highlights how trade routes connected the Arabian Gulf, East Africa, India, China, and Southeast Asia through the exchange of spices, pearls, textiles, jewelry, and religious beliefs.

— Melissa Hancock, Fortune, 21 Oct. 2026
The verdict, Wright says, shattered his belief in both the judicial system and religion.

— Los Angeles Times, Los Angeles Times, 20 Oct. 2026

Definition of belief

Noun

Pollet, the state representative who sponsored the 2018 presumption bill, acknowledged that the law has fallen short of his expectation.

— Lizz Giordano, ProPublica, 22 Oct. 2026
To many, not least the young, both literary culture and the world of bookselling are beginning a great new climb, calling into question many presumptions about the digital century and the market models that sustain it.

— Nathan Heller, New Yorker, 22 Oct. 2026

Definition of presumption

Browse Nearby Words

assuming

assumption

assumptions

See all Nearby Words

Cite this Entry

Style

“Assumption.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/assumption. Accessed 28 Oct. 2026.

Copy Citation

Synonyms of assumption

noun

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster on assumption

More from Merriam-Webster

Word of the Day

grotesque

Popular in Grammar & Usage

How to Use 'Who' vs. 'Whom'

Merriam-Webster’s Great Big List of Words You Love to Hate

'Affect' vs. 'Effect'

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

Popular in Wordplay

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

12 Lovely and Unusual Words for the Natural World

Why do we 'bury the lede?'

'Za' and 9 Other Words to Help You Win at SCRABBLE

Popular

How to Use 'Who' vs. 'Whom'

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

Games & Quizzes