Tournament
Part of speech: noun
Definition: A series of games; either the same game played many times, or a succession of games related by a single theme; played competitively to determine a single winning team or individual.
Example sentence: You have to show you have ambition as a team, as a group of players; show you want to win. Otherwise, in my opinion, you can't win a tournament.
Tourney
Part of speech: noun
Definition: tournament
Part of speech: verb
Definition: To take part in a tournament.