Synonyms for the word shortstop include fielder, infielder, defense player, and stopper. Fielder refers to an athlete who is responsible for playing in the field and catching and throwing the ball. Infielder is a term used to describe an athlete who plays in the infield part of the field. Defense player refers to an athlete whose main function is to prevent the opposing team from scoring by making stops. Stopper is a term used to describe a player whose primary role is to halt the progress of the opposing team's offense. These words can be used interchangeably to describe a shortstop, depending on the context of the situation.