plural form vs boxcars

plural form and boxcars both are nouns.

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

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