sidespin

As nouns the difference between topspin and sidespin

is that topspin is a rotational motion, especially that given to a ball, in which the upper surface spins in the direction of motion while sidespin is rotation around a vertical axis that makes a ball or other object curve in flight.

As a verb topspin

is to spin (a ball) with this motion.

As nouns the difference between taxonomy and sidespin

is that taxonomy is the science or the technique used to make a classification while sidespin is rotation around a vertical axis that makes a ball or other object curve in flight.