denim vs plural form

denim and plural form both are nouns.

Word	Noun	Adjective	Verb	Adverb
denim	Yes	No	No	No
plural form	Yes	No	No	No

denim (noun)	plural form (noun)
a coarse durable twill-weave cotton fabric	the form of a word that is used to denote more than one
(used in the plural) close-fitting trousers of heavy denim for manual work or casual wear