unemployed people vs plural form

unemployed people and plural form both are nouns.

Word	Noun	Adjective	Verb	Adverb
unemployed people	Yes	No	No	No
plural form	Yes	No	No	No

unemployed people (noun)	plural form (noun)
people who are involuntarily out of work (considered as a group)	the form of a word that is used to denote more than one