striker vs firing pin

striker and firing pin both are nouns.

Word	Noun	Adjective	Verb	Adverb
striker	Yes	No	No	No
firing pin	Yes	No	No	No

As nouns, firing pin is a hyponym of striker; that is, firing pin is a word with a more specific, narrower meaning than striker:

Other hyponyms of striker include clapper, tongue, hammer, cock, hammer, head.

striker (noun)	firing pin (noun)
the part of a mechanical device that strikes something	striker that ignites the charge by striking the primer
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