denim vs jean

denim and jean both are nouns.

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

As nouns, denim and jean are synonyms defined as:

Other synonyms of denim include dungaree.

denim (noun)	jean (noun)
a coarse durable twill-weave cotton fabric	a coarse durable twill-weave cotton fabric
(used in the plural) close-fitting trousers of heavy denim for manual work or casual wear