fuel system vs equipment

fuel system and equipment both are nouns.

Word	Noun	Adjective	Verb	Adverb
fuel system	Yes	No	No	No
equipment	Yes	No	No	No

As nouns, equipment is a hypernym of fuel system; that is, equipment is a word with a broader meaning than fuel system:

fuel system: equipment in a motor vehicle or aircraft that delivers fuel to the engine
equipment: an instrumentality needed for an undertaking or to perform a service

fuel system (noun)	equipment (noun)
equipment in a motor vehicle or aircraft that delivers fuel to the engine	an instrumentality needed for an undertaking or to perform a service