carbon nanotube vs fullerene

carbon nanotube and fullerene both are nouns.

Word	Noun	Adjective	Verb	Adverb
carbon nanotube	Yes	No	No	No
fullerene	Yes	No	No	No

As nouns, fullerene is a hypernym of carbon nanotube; that is, fullerene is a word with a broader meaning than carbon nanotube:

carbon nanotube: a fullerene molecule having a cylindrical or toroidal shape
fullerene: a form of carbon having a large molecule consisting of an empty cage of sixty or more carbon atoms

carbon nanotube (noun)	fullerene (noun)
a fullerene molecule having a cylindrical or toroidal shape	a form of carbon having a large molecule consisting of an empty cage of sixty or more carbon atoms