boxcars vs plural

boxcars and plural both are nouns.

Word	Noun	Adjective	Verb	Adverb
boxcars	Yes	No	No	No
plural	Yes	Yes	No	No

boxcars (noun)	plural (noun)
(usually plural) an expression used when two dice are thrown and both come up showing six spots	the form of a word that is used to denote more than one

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