denim vs textile

denim and textile both are nouns.

Word	Noun	Adjective	Verb	Adverb
denim	Yes	No	No	No
textile	Yes	Yes	No	No

As nouns, textile is a hypernym of denim; that is, textile is a word with a broader meaning than denim:

denim: a coarse durable twill-weave cotton fabric
textile: artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

Other hypernyms of denim include cloth, fabric, material.

denim (noun)	textile (noun)
a coarse durable twill-weave cotton fabric	artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers
(used in the plural) close-fitting trousers of heavy denim for manual work or casual wear

denim (adjective)	textile (adjective)
	of or relating to fabrics or fabric making