Hypothesis
Hypothesis noun - An idea that is the starting point for making a case or conducting an investigation.
Usage example: working on the hypothesis that teenagers function better in the late morning, some high schools are starting classes later
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Synonyms for Hypothesis
Theory is a synonym for hypothesis in belief topic. In some cases you can use "Theory" instead a noun "Hypothesis", when it comes to topics like notion, opinion, idea, conjecture. popular alternative
Theory
Theory noun - An idea that is the starting point for making a case or conducting an investigation.
Usage example: set out to prove her theory that people can't really taste any difference between colas, so they buy according to the product's image
Hypothesis is a synonym for theory in belief topic. You can use "Hypothesis" instead a noun "Theory", if it concerns topics such as notion, opinion, idea, conjecture. popular alternative
Mutual synonyms
How words are described
| old | old hypothesis | old theory |
| nice | nice hypothesis | nice theory |
| best | best hypothesis | best theory |
| common | common hypothesis | common theory |
| Other adjectives: alien, original, likely, wild, popular, actual, entire, real, wrong, infamous, alternative, interesting, personal, leading, accepted, possible, above, alternate, multiple, scientific, modern, long-standing. | ||
Both words in one sentence
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The discovery that every sapient species in the universe was uplifted turns the Ancient Astronauts hypothesis into conventional wisdom and changes the idea that humans merely evolved sapience into a crazy fringe theory.
Source: Literature / Uplift - Your Magic's No Good Here: Kimblee admits that he actually doesn't know why everyone was Brought Down to Normal and the "fee paid to the Gate" theory is only a theory, with this being his secondary hypothesis.
Source: Roleplay / Trustfell - In Harry Potter and the Methods of Rationality, this is the theory Harry and Draco came up with as the primary alternate hypothesis to the pureblood credo that muggle blood is weakening magical ability: ambient magic is slowly fading.
Source: The Magic Goes Away
Cite this Source
Theory and Hypothesis. (2016). Retrieved 2026, July 20, from https://thesaurus.plus/related/hypothesis/theory
Hypothesis & Theory. N.p., 2016. Web. 20 Jul. 2026. <https://thesaurus.plus/related/hypothesis/theory>.
Theory or Hypothesis. 2016. Accessed July 20, 2026. https://thesaurus.plus/related/hypothesis/theory.
Google Ngram Viewer shows how "hypothesis" and "theory" have occurred on timeline