stator vs mechanical device

stator and mechanical device both are nouns.

Word	Noun	Adjective	Verb	Adverb
stator	Yes	No	No	No
mechanical device	Yes	No	No	No

As nouns, mechanical device is a hypernym of stator; that is, mechanical device is a word with a broader meaning than stator:

stator: mechanical device consisting of the stationary part of a motor or generator in or around which the rotor revolves
mechanical device: mechanism consisting of a device that works on mechanical principles

stator (noun)	mechanical device (noun)
mechanical device consisting of the stationary part of a motor or generator in or around which the rotor revolves	mechanism consisting of a device that works on mechanical principles