certainty

noun
  1. The state of being sure or confident about something; the quality of being reliably true or inevitable. noun
    There is a certainty about her success in the upcoming competition.
    The certainty of the sunrise gives us a sense of stability.
  2. Something that is certain or assured; a fact or situation that is definitely true or will happen. noun
    Death and taxes are often said to be the only certainties in life.
    Winning the championship seemed like a certainty after their impressive season.