pump vs piston chamber

pump and piston chamber both are nouns.

Word	Noun	Adjective	Verb	Adverb
pump	Yes	No	Yes	No
piston chamber	Yes	No	No	No

pump (noun)	piston chamber (noun)
a mechanical device that moves fluid or gas by pressure or suction	a chamber within which piston moves
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

pump (verb)	piston chamber (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