What is another word for gearwheel?
Pronunciation: [ɡˈi͡əwiːl] (IPA) 
Gearwheel is a term often used interchangeably with other similar terms such as cogwheel, cog, and spur gear. A cogwheel typically refers to a gear toothed wheel in which the teeth are cut in the shape of cogs or rectangular teeth that are evenly spaced around the wheel. Meanwhile, cog is used to refer to a single tooth on a gear wheel. Finally, spur gear, like gearwheel, refers to a gear with straight teeth that mesh with another straight-toothed gear. Other synonyms for gearwheel include pinion, sprocket, and crown gear. Despite the differences in terminology used for these gears, all of them still perform the same function in a machinery system, which is to transmit torque and power between rotating components.
