SUPPOSITION Synonyms: 70 Similar and Opposite Words

supposition

noun

ˌsə-pə-ˈzi-shən

as in hypothesis

an idea that is the starting point for making a case or conducting an investigation my supposition is that this grape variety, which flourishes in southern France, should do equally well here, given the similar climate

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in guess

an opinion or judgment based on little or no evidence it's pure supposition on your part that there's something illegal going on next door

Synonyms & Similar Words

as in assumption

something taken as being true or factual and used as a starting point for a course of action or reasoning worthless genetic research that was based on the erroneous supposition that acquired characteristics can be passed on to offspring

Synonyms & Similar Words

Example Sentences

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Recent Examples of supposition Under California law, fraud must be pled with particularity, meaning there must be specifics and details in the complaint; generalizations, inferences and supposition don’t cut it. —

Michael McCann, Sportico.com, 16 Jan. 2026 The nature of Tech’s loss only supports the supposition that, without Texas and Oklahoma, the Big 12 is sorely lacking in top-tier talent. —

Kevin Sherrington jan. 1, Dallas Morning News, 1 Jan. 2026 Both Ripa and Consuelos rejected the supposition, with Ripa admitting that the only evening during which Consuelos looks presentable during the holidays is Christmas Eve. —

Joey Nolfi, Entertainment Weekly, 21 Nov. 2025 Slavik knocked Combs for lining up speaking engagements for as soon as next week with the supposition that he’d be released. —

Nicki Brown, CNN Money, 4 Oct. 2025 See All Example Sentences for supposition

Recent Examples of Synonyms for supposition

Noun

If more evidence shows GLP-1 drugs are found to reduce the chance of cancer progressing, the researchers also want to figure out why and have many possible hypotheses at the moment, including the drug changing the immune system, acting directly on tumor cells and reducing inflammation.

— Victoria Forster, Forbes.com, 25 May 2026
Older children might like setting up an experiment by altering the balance of something essential, like water, for different plants and making hypotheses about what the right balance is.

— Jamie Siebrase, Denver Post, 20 May 2026