noun
belief, speculation
Synonyms: assumption, ballpark figure, conclusion, conjecture, deduction, divination, estimate, fancy, feeling, guesstimate, guesswork, hunch, hypothesis, induction, inference, judgment, notion, opinion, postulate, postulation, prediction, presumption, presupposition, reckoning, shot, shot in the dark, sneaking suspicion, stab, supposal, supposition, surmisal, surmise, suspicion, theory, thesis, view
Antonyms: calculation, measurement
verb
try to figure out; imagine
Synonyms: believe, calculate, chance, conjecture, dare say, deduce, deem, divine, estimate, fancy, fathom, go out on a limb, guesstimate, happen upon, hazard, hypothesize, infer, judge, jump to a conclusion, lump it, opine, penetrate, pick, postulate, predicate, predict, presume, pretend, reason, reckon, select, size up, solve, speculate, suggest, suppose, surmise, survey, suspect, take a shot at, take a stab at, theorize, think, think likely, venture, work out
Antonyms: calculate, measure