archeological remains vs plural

archeological remains and plural both are nouns.

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

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

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