Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun hypothesis

3 senses of hypothesis

Sense 1
hypothesis -- (a proposal intended to explain certain facts or observations)
       => proposal -- (something proposed (such as a plan or assumption))

Sense 2
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; "a scientific hypothesis that survives experimental testing becomes a scientific theory"; "he proposed a fresh theory of alkalis that later was accepted in chemical practices")
       => concept, conception, construct -- (an abstract or general idea inferred or derived from specific instances)

Sense 3
guess, conjecture, supposition, surmise, surmisal, speculation, hypothesis -- (a message expressing an opinion based on incomplete evidence)
       => opinion, view -- (a message expressing a belief about something; the expression of a belief that is held with confidence but not substantiated by positive knowledge or proof; "his opinions appeared frequently on the editorial page")