nanotube vs fullerene

nanotube and fullerene both are nouns.

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

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

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

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