THEORY Synonyms: 35 Similar and Opposite Words

Q: How does the noun 'theory' differ from other similar words?

The words hypothesis and law are common synonyms of theory . While all three words mean "a formula derived by inference from scientific data that explains a principle operating in nature," theory implies a greater range of evidence and greater likelihood of truth. // the theory of evolution

Q: When would 'hypothesis' be a good substitute for 'theory'?

Although the words hypothesis and theory have much in common, hypothesis implies insufficient evidence to provide more than a tentative explanation. // a hypothesis explaining the extinction of the dinosaurs

Q: When might 'law' be a better fit than 'theory'?

The meanings of law and theory largely overlap; however, 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

theory

noun

ˈthē-ə-rē

Definition of theory next

as in hypothesis

an idea that is the starting point for making a case or conducting an investigation 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

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How does the noun theory differ from other similar words?

The words hypothesis and law are common synonyms of theory. While all three words mean "a formula derived by inference from scientific data that explains a principle operating in nature," theory implies a greater range of evidence and greater likelihood of truth.

the theory of evolution

When would hypothesis be a good substitute for theory?

Although the words hypothesis and theory have much in common, hypothesis implies insufficient evidence to provide more than a tentative explanation.

a hypothesis explaining the extinction of the dinosaurs

When might law be a better fit than theory?

The meanings of law and theory largely overlap; however, 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

Examples of theory in a Sentence

Recent Examples on the Web The theory that merging the two will promote productivity and other joyful feelings comes from the science that caffeine is a stimulant. —

Rowan Briggs, The Mercury News, 25 Oct. 2024 The American Cancer Society and the National Cancer Institute have both denounced theories that the COVID vaccine causes cancer. —

Glenn Garner, Deadline, 24 Oct. 2024 However, there are theories that factors like temperature, sun exposure, or seasonal activities can all influence hair shedding at certain times of the year. —

William Truswell, Verywell Health, 24 Oct. 2024 Today’s Wordle Etymology The word gamut originates from medieval music theory. —

Erik Kain, Forbes, 14 Oct. 2024 See all Example Sentences for theory

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'theory.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.