stalactite vs cylinder

stalactite and cylinder both are nouns.

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

As nouns, cylinder is a hypernym of stalactite; that is, cylinder is a word with a broader meaning than stalactite:

stalactite: a cylinder of calcium carbonate hanging from the roof of a limestone cave
cylinder: a surface generated by rotating a parallel line around a fixed line

stalactite (noun)	cylinder (noun)
a cylinder of calcium carbonate hanging from the roof of a limestone cave	a cylindrical container for oxygen or compressed air
	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)