Definition of hypothesisnext
as in theory
an idea that is the starting point for making a case or conducting an investigation working on the hypothesis that teenagers function better in the late morning, some high schools are starting classes later

Synonyms & Similar Words

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How does the noun hypothesis differ from other similar words?

The words law and theory are common synonyms of hypothesis. While all three words mean "a formula derived by inference from scientific data that explains a principle operating in nature," hypothesis implies insufficient evidence to provide more than a tentative explanation.

a hypothesis explaining the extinction of the dinosaurs

When can law be used instead of hypothesis?

The synonyms law and hypothesis are sometimes interchangeable, but law implies a statement of order and relation in nature that has been found to be invariable under the same conditions.

the law of gravitation

In what contexts can theory take the place of hypothesis?

The words theory and hypothesis can be used in similar contexts, but theory implies a greater range of evidence and greater likelihood of truth.

the theory of evolution

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 hypothesis This supports the hypothesis that Dimorphos formed from material that was once upon a time spun-off from Didymos. Keith Cooper, Space.com, 10 Mar. 2026 Contributor Yelena Alpert has a sneaking suspicion that these Frette slippers will last a lifetime, attributing her hypothesis to the shoe’s superior quality. Julia Harrison, Architectural Digest, 10 Mar. 2026 Though the data does not explain this difference entirely, the working hypothesis is that the greater velocity often involved with e-bikes plays a significant role. Paul Sisson, San Diego Union-Tribune, 9 Mar. 2026 Police are looking at several hypotheses. Omer Bekin, NBC news, 8 Mar. 2026 See All Example Sentences for hypothesis
Recent Examples of Synonyms for hypothesis
Noun
  • Researchers developed a new approach, the constant inner potential density functional theory, which enables the inclusion of the electrode potential in the simulation of semiconductor electrochemistry.
    Prabhat Ranjan Mishra, Interesting Engineering, 15 Mar. 2026
  • In addition to being politically fraught, the plan would undoubtedly be the target of litigation under a variety of legal theories.
    Jon Coupal, Oc Register, 15 Mar. 2026
Noun
  • Clark, a Harvard engineer who wrote his college thesis on electric aviation 25 years ago, hopes to get the certification needed for his aircraft to carry paying passengers by the end of next year.
    Andrew Edgecliffe-Johnson, semafor.com, 13 Mar. 2026
  • The film doesn’t just pilfer that thesis.
    David Fear, Rolling Stone, 13 Mar. 2026
Noun
  • Russell, who signed onto the project later in the process, says that the combination of Sheridan’s writing and the chance to work with Pfeiffer was a winning proposition.
    William Earl, Variety, 14 Mar. 2026
  • That value proposition falls the longer it’s been since a movie’s release date, particularly if the film ends up flopping in theaters.
    Josef Adalian, Vulture, 12 Mar. 2026

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Cite this Entry

“Hypothesis.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/hypothesis. Accessed 17 Mar. 2026.

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