Nouns

(n)guess, conjecture, supposition, surmise, surmisal, speculation, hypothesisa message expressing an opinion based on incomplete evidence
(n)guess, guesswork, guessing, shot, dead reckoningan estimate based on little or no information

Verbs

(v)think, opine, suppose, imagine, reckon, guessexpect, believe, or suppose“I imagine she earned a lot of money with her new novel”, “I thought to find her in a bad state”, “he didn't think to find her in the kitchen”, “I guess she is angry at me for standing her up”
(v)guess, venture, pretend, hazardput forward, of a guess, in spite of possible refutation“I am guessing that the price of real estate will rise again”, “I cannot pretend to say that you are wrong”
(v)estimate, gauge, approximate, guess, judgejudge tentatively or form an estimate of (quantities or time)“I estimate this chicken to weigh three pounds”
(v)guess, inferguess correctly; solve by guessing“He guessed the right number of beans in the jar and won the prize”