cylinder vs piston chamber

cylinder and piston chamber both are nouns.

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

As nouns, cylinder and piston chamber are synonyms defined as:

cylinder (noun)	piston chamber (noun)
a cylindrical container for oxygen or compressed air	a chamber within which piston moves
a chamber within which piston moves
a surface generated by rotating a parallel line around a fixed line
a solid bounded by a cylindrical surface and two parallel planes (the bases)