fuel system vs pump

fuel system and pump both are nouns.

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

fuel system (noun)	pump (noun)
equipment in a motor vehicle or aircraft that delivers fuel to the engine	a mechanical device that moves fluid or gas by pressure or suction
	a low-cut shoe without fastenings
	the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body

fuel system (verb)	pump (verb)
	question persistently
	deliver forth
	operate like a pump; move up and down, like a handle or a pedal
	raise (gases or fluids) with a pump
	draw or pour with a pump
	flow intermittently
	move up and down
	supply in great quantities