Mechanical device and Wiper blade

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

Wiper blade and mechanical device are semantically related. In some cases you can replace phrase "Wiper blade" with "Mechanical device", this phrases are similar.

Wiper blade noun - A mechanical device that cleans the windshield.

Mechanical device and wiper blade are semantically related. You can use "Mechanical device" instead a noun phrase "Wiper blade".