plural form vs interest group

plural form and interest group both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural form	Yes	No	No	No
interest group	Yes	No	No	No

plural form (noun)	interest group (noun)
the form of a word that is used to denote more than one	(usually plural) a social group whose members control some field of activity and who have common aims