conjecture - noun

a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence)

a message expressing an opinion based on incomplete evidence

reasoning that involves the formation of conclusions from incomplete evidence

conjecture - verb

• to believe especially on uncertain or tentative grounds

conjecture - thesaurus

guess   hypothecate   hypothesis   hypothesise   hypothesize   speculate   speculation   suppose   supposition   surmisal   surmise   theorise   theorize