pyrocellulose vs nitrocotton

pyrocellulose and nitrocotton both are nouns.

Word	Noun	Adjective	Verb	Adverb
pyrocellulose	Yes	No	No	No
nitrocotton	Yes	No	No	No

As nouns, nitrocotton is a hypernym of pyrocellulose; that is, nitrocotton is a word with a broader meaning than pyrocellulose:

pyrocellulose: nitrocellulose containing less nitrogen than guncotton; used in making smokeless powder
nitrocotton: a nitric acid ester; used in lacquers and explosives

Other hypernyms of pyrocellulose include cellulose nitrate, guncotton, nitrocellulose.

pyrocellulose (noun)	nitrocotton (noun)
nitrocellulose containing less nitrogen than guncotton; used in making smokeless powder	a nitric acid ester; used in lacquers and explosives