plural vs archeological remains

plural and archeological remains both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural	Yes	Yes	No	No
archeological remains	Yes	No	No	No

plural (noun)	archeological remains (noun)
the form of a word that is used to denote more than one	a relic that has been excavated from the soil

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