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

The findings also support what researchers call the "Southern Ocean Exchange" hypothesis.

From Science Daily • 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

Argentinian officials who spoke anonymously to some news outlets have said that is their leading hypothesis.

From BBC • May 10, 2026

But once it became common to refer to Copernicanism as an hypothesis, then other hypotheses—magnetical, atomic, mechanical—multiplied.

From "The Invention of Science" by David Wootton

Vocabulary lists containing hypothesis

The SAT: Language of the Test, List 1

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

100 Top "SAT" Words

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Tier 2 Words for the SBAC ELA Items

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!