plural vs piece goods

plural and piece goods both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural	Yes	Yes	No	No
piece goods	Yes	No	No	No

plural (noun)	piece goods (noun)
the form of a word that is used to denote more than one	merchandise in the form of fabrics sold by the yard

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