toss-up
Definitions
A situation in which two outcomes are equally possible.
A contest or decision in which the chances of winning or losing are equal.
Examples
The outcome of the championship game is a complete toss-up between the two evenly matched teams.
It is a toss-up whether we should take the train or drive to the city for the weekend.
Analysts say the upcoming election is a toss-up, as neither candidate has a clear lead in the polls.
Synonyms
coin flip dead heat even chance fifty-fifty standoff tie uncertainty
Antonyms
certainty sure thing foregone conclusion inevitability decisiveness clear winner predictability