striker vs mechanical device

striker and mechanical device both are nouns.

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

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

striker: the part of a mechanical device that strikes something
mechanical device: mechanism consisting of a device that works on mechanical principles

striker (noun)	mechanical device (noun)
the part of a mechanical device that strikes something	mechanism consisting of a device that works on mechanical principles
an employee on strike against an employer
someone receiving intensive training for a naval technical rating
a forward on a soccer team
someone who hits