conjecture

Meanings

• a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence)
  • "he dismissed it as mere conjecture"
• a message expressing an opinion based on incomplete evidence
• reasoning that involves the formation of conclusions from incomplete evidence
• to believe especially on uncertain or tentative grounds

Synonyms

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