| speculation(noun, idea, belief, guess, opinion) |
| apriorism(noun, condition, idea, belief, guess) |
| assumption(noun, idea, belief, guess, opinion) |
| conjecture(noun, idea, belief, thought, guess) |
| guess(noun, idea, belief, opinion, theory) |
| guesstimate(noun, idea, belief, guess, opinion) |
| guesswork(noun, idea, belief, guess, opinion) |
| hunch(noun, idea, belief, guess, opinion) |
| hypothesis(noun, idea, belief, guess, opinion) |
| notion(noun, idea, belief, guess, theory) |
| opinion(noun, idea, belief, guess, theory) |
| presumption(noun, idea, belief, guess, theory) |
| rough guess(noun, expression, condition, idea, belief) |
| shot in the dark(noun, expression, idiom, idea, belief) |
| sneaking suspicion(noun, expression, idea, belief, guess) |
| starting point(expression, theory, guesstimate, premise) |
| supposition(noun, idea, belief, guess, opinion) |
| surmise(noun, idea, belief, guess, opinion) |
| theory(noun, idea, belief, guess, opinion) |
| apriority(theory, guesstimate, premise) |