pyroxyline vs nitrocellulose

pyroxyline and nitrocellulose both are nouns.

Word	Noun	Adjective	Verb	Adverb
pyroxyline	Yes	No	No	No
nitrocellulose	Yes	No	No	No

As nouns, nitrocellulose is a hypernym of pyroxyline; that is, nitrocellulose is a word with a broader meaning than pyroxyline:

pyroxyline: highly flammable nitrocellulose used in making collodion and plastics and lacquers
nitrocellulose: a nitric acid ester; used in lacquers and explosives

Other hypernyms of pyroxyline include cellulose nitrate, guncotton, nitrocotton.

pyroxyline (noun)	nitrocellulose (noun)
highly flammable nitrocellulose used in making collodion and plastics and lacquers	a nitric acid ester; used in lacquers and explosives