rayon vs viscose

rayon and viscose both are nouns.

Word	Noun	Adjective	Verb	Adverb
rayon	Yes	No	No	No
viscose	Yes	No	No	No

As nouns, viscose is a hyponym of rayon; that is, viscose is a word with a more specific, narrower meaning than rayon:

Other hyponyms of rayon include acetate, acetate rayon, viscose rayon.

rayon (noun)	viscose (noun)
a synthetic silklike fabric	a rayon fabric made from viscose (cellulose xanthate) fibers
	a cellulose ester obtained by treating cellulose with caustic soda