Bout and Inning

Bout noun - A competitive encounter between individuals or groups carried on for amusement, exercise, or in pursuit of a prize.

Inning and bout are semantically related in time topic. In some cases you can use "Inning" instead a noun "Bout".

Inning noun - (baseball) one of nine divisions of play during which each team has a turn at bat.

Bout and inning are semantically related in turn topic. You can use "Bout" instead a noun "Inning", if it concerns topics such as time.