Appliance and Piston

Appliance noun - An interesting and often novel device with a practical use.

Piston and appliance are semantically related In some cases you can use "Piston" instead a noun "Appliance".

Piston noun - Mechanical device that has a plunging or thrusting motion.

Appliance and piston are semantically related in device that drives a machine topic. You can use "Appliance" instead a noun "Piston".