1. (noun) hypothesis
a proposal intended to explain certain facts or observations
Synonyms: theory, surmisal, possibility, guess, conjecture, supposition, surmise, speculation
2. (noun) hypothesis, possibility, theory
a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
Synonyms: theory, possibleness, surmisal, hypothesis, possibility, opening, guess, conjecture, possible action, supposition, surmise, speculation
3. (noun) guess, conjecture, supposition, surmise, surmisal, speculation, hypothesis
a message expressing an opinion based on incomplete evidence
Synonyms: guess, possibility, conjecture, surmise, guesswork, theory, meditation, venture, supposition, dead reckoning, guessing, surmisal, supposal, assumption, hypothesis, speculation, shot
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Synonyms and Antonyms of hypothesis 
