Gearshift and Mechanical device

Gearshift noun - A mechanical device for engaging and disengaging gears.

Mechanical device and gearshift are semantically related. In some cases you can use "Mechanical device" instead a noun "Gearshift".

Mechanical device noun - Mechanism consisting of a device that works on mechanical principles.

Gearshift and mechanical device are semantically related. Sometimes you can replace term "Gearshift" with "Mechanical device", this terms are similar.