distressed jeans vs denim

distressed jeans and denim both are nouns.

Word	Noun	Adjective	Verb	Adverb
distressed jeans	Yes	No	No	No
denim	Yes	No	No	No

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

distressed jeans: A pair of jean trousers ripped and bleached on purpose or by extended wear.
denim: (used in the plural) close-fitting trousers of heavy denim for manual work or casual wear

Other hypernyms of distressed jeans include blue jeans, jeans.

distressed jeans (noun)	denim (noun)
A pair of jean trousers ripped and bleached on purpose or by extended wear.	a coarse durable twill-weave cotton fabric
	(used in the plural) close-fitting trousers of heavy denim for manual work or casual wear