Cogwheel and Sprocket

Cogwheel noun - A toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion.

Sprocket and cogwheel are semantically related in thing topic. In some cases you can use "Sprocket" instead a noun "Cogwheel", when it comes to topics like mechanical transmission, toothed part of wheel.

Sprocket noun - Tooth on the rim of gear wheel.

Cogwheel and sprocket are semantically related in thing topic. You can use "Cogwheel" instead a noun "Sprocket", if it concerns topics such as mechanical transmission, toothed part of wheel.