plural vs dirty tricks

plural and dirty tricks both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural	Yes	Yes	No	No
dirty tricks	Yes	No	No	No

plural (noun)	dirty tricks (noun)
the form of a word that is used to denote more than one	underhand commercial or political behavior designed to discredit an opponent

plural (adjective)	dirty tricks (adjective)
grammatical number category referring to two or more items or units
composed of more than one member, set, or kind