cylinder vs pipe

cylinder and pipe both are nouns.

Word	Noun	Adjective	Verb	Adverb
cylinder	Yes	No	No	No
pipe	Yes	No	Yes	No

As nouns, pipe is a hyponym of cylinder; that is, pipe is a word with a more specific, narrower meaning than cylinder:

cylinder: a surface generated by rotating a parallel line around a fixed line
pipe: a hollow cylindrical shape

Other hyponyms of cylinder include brake drum, drum, shank, shank, shank, stem, stalactite, stalagmite, barrel, drum, tube.

cylinder (noun)	pipe (noun)
a cylindrical container for oxygen or compressed air	a long tube made of metal or plastic that is used to carry water or oil or gas etc.
a chamber within which piston moves	a tube with a small bowl at one end; used for smoking tobacco
a surface generated by rotating a parallel line around a fixed line	the flues and stops on a pipe organ
a solid bounded by a cylindrical surface and two parallel planes (the bases)	a tubular wind instrument
	a hollow cylindrical shape