"Sidespin" is a term used in sports like tennis and table tennis, which describes the spin of the ball moving in a diagonal direction. However, there are other synonyms that can be used instead of sidespin. These include "sideswipe," which refers to a glancing blow off to one side, "curveball," which is used commonly in baseball to describe a pitch that curves, "slice," which is also used in tennis and golf to describe a shot with sidespin, and "swerve," which is used in soccer to describe a ball that curves to avoid a defender. These synonyms can help provide more descriptive language for players and commentators when discussing the movements of the ball.