uncertainty

Noun

• the state of being unsure of something

• being unsettled or in doubt or dependent on chance
  • the uncertainty of the outcome
    
  • the precariousness of his income
    

Related words

• Synonyms: 
  doubt , incertitude , dubiety , doubtfulness , dubiousness , uncertainness , precariousness
• Antonyms: 
  certainty , sure thing , foregone conclusion