試合・しあい: a game: baseball, checkers, football, chess.

競争・きょうそう: a contest where the winner is judged by a third party: a marathon, two guys fighting over a lady, the best score on the test, the salesman who sold the most this month.

競技 :きょうぎ: games IN GENERAL. Like they don't say 'olympic games', they say 'olympic 競技’. or 'he really likes games' or ???


勝負:しょうぶ: ???


闘う :???