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 Such innovations challenge conventional assumptions about air superiority. — Phillips Payson O’Brien, The Atlantic, 18 July 2026 In his first official statement here, Rose seemed to confirm all assumptions about his character. — Kansas City Star, 18 July 2026 The assumption for years was that a patient who could not demonstrate awareness did not possess any. — Torie Bosch, STAT, 18 July 2026 The assumption that intensifying economic pain alone, without other efforts or sacrifices on Europe’s part, would eventually enable some vague political re-calibration in Moscow has, so far, not been borne out by events. — Wesley Alexander Hill, Forbes.com, 17 July 2026 See All Example Sentences for assumption

Recent Examples of Synonyms for assumption

Noun

One theory is that English and European voices provide an air of authority, even legitimacy, to a sport which, while embraced by millions in America, is still ‘foreign’, certainly when compared to NFL, baseball and basketball.

— Nick Miller, New York Times, 18 July 2026
Speculation was rife; one unproven theory was that someone had heated the sensor with a hairdryer.

— Laura Paddison, CNN Money, 17 July 2026

Definition of theory

Noun

That buy-in proves essential to a movie whose premise requires you to suspend every iota of your disbelief, lest its Lanthimos-lite approach to child abduction curdle into something much darker.

— David Ehrlich, IndieWire, 17 July 2026
The bakery must have the premises serviced by a pest control operator before reopening, the report said.

— Zareen Syed, Chicago Tribune, 17 July 2026

Definition of premise

Noun

By vilifying others, Marx could use moral superiority to legally steal from those who had more.

— Voice of the People, New York Daily News, 9 July 2026
We are encouraged to indulge our delusions about replacement theory and white male superiority and to surrender to our instincts toward incivility and division.

— Dawn M. Turner, Chicago Tribune, 5 July 2026

Definition of superiority

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

One other surprising benefit could be to shift people’s attitudes to climate change, according to recent research.

— Laura Paddison, CNN Money, 17 July 2026
As Odysseus wanders from place to place, discovering the foreign customs and attitudes of each one, the story explores the concept of home, asking what kind of civilization is appropriate for an authentic human being.

— Literary Hub, Literary Hub, 17 July 2026

Definition of attitude

Noun

For many Colombians, the attack on Uribe Turbay shattered the belief that the country had largely left behind the era when presidential candidates routinely became targets of political violence.

— Antonio María Delgado, Miami Herald, 21 July 2026
As the league emerges from this summer of soccer, however, there is a strong belief that missing the immediate moment shouldn’t mean missing the bigger picture.

— Paul Tenorio, New York Times, 21 July 2026

Definition of belief

Noun

Success breeds overconfidence; overconfidence hardens into presumption; and presumption eventually obscures the actual source of momentum.

— Clifford Hudson, Forbes.com, 20 July 2026
Torres wrote that courts apply a presumption against preemption in areas where states historically exercised their police powers, and gambling regulation has historically been left to states.

— Jon Brodkin, ArsTechnica, 8 July 2026

Definition of presumption

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assuming

assumption

assumptions

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“Assumption.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/assumption. Accessed 22 Jul. 2026.

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Synonyms of assumption

noun

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