Gear and Gear box

Gear noun - Items needed for the performance of a task or activity.

Gear box and gear are semantically related in gearbox topic. In some cases you can use "Gear box" instead a noun "Gear", when it comes to topics like reduction gear.

Nearby Words: geared, gearing, gearbox

Gear box noun - The shell (metal casing) in which a train of gears is sealed.

Gear and gear box are semantically related in gearbox topic. You can use "Gear" instead a noun phrase "Gear box", if it concerns topics such as reduction gear.