hypothesis

[hahy-poth-uh-sis, hi-] / haɪˈpɒθ ə sɪs, hɪ- /

NOUN

theory

Synonyms

STRONGEST

assumption axiom conclusion conjecture explanation guess inference interpretation premise proposition rationale supposition theorem thesis

STRONG

antecedent assignment attribution basis belief condition data deduction demonstration derivation foundation ground layout lemma philosophy plan position postulate presupposition principle proposal reason scheme speculation suggestion surmise system term

WEAK

apriority shot in the dark starting point tentative law

Antonyms

STRONGEST

fact proof reality truth

WEAK

calcualtion measurement

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

That hypothesis suggests the mammals sometimes travel to feeding grounds in the Antarctic but then take a different journey home -- ending up in a completely new breeding area.

From Barron's • May 20, 2026

Its goal was to test the hypothesis: Does using hormone therapy decrease the risk of heart disease?

From MarketWatch • May 12, 2026

Their work connects the Boltzmann brain hypothesis, the second law of thermodynamics, and the related "past hypothesis," which assumes the universe began in a state of low entropy.

From Science Daily • May 3, 2026

Concern about climate change "had taken second place to issues like cost of living, economy and also immigration" in recent years, the environment psychologist explained, citing a hypothesis known as the "finite pool of worry".

From BBC • Apr. 30, 2026

"Now, if you done interrupting, let me continue with my hypothesis."

From "Look Both Ways" by Jason Reynolds

Vocabulary lists containing hypothesis

The SAT: Language of the Test, List 1

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100 Top "SAT" Words

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Tier 2 Words for the SBAC ELA Items

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