Conjecture Conjecture synonyms guess conjecture and guess surmise conjecture and surmise suppose conjecture and suppose supposition conjecture and supposition speculation conjecture and speculation hypothesis conjecture and hypothesis speculate conjecture and speculate hypothesize conjecture and hypothesize assume conjecture and assume guesswork conjecture and guesswork Full list of synonyms (1135) Conjecture antonyms fact conjecture and fact proof conjecture and proof prove conjecture and prove truth conjecture and truth reality conjecture and reality measure conjecture and measure know conjecture and know calculate conjecture and calculate certainty conjecture and certainty not believe conjecture and not believe Full list of antonyms (27) Share this picture Share this image Share this picture Share this image