poor vs plural

poor and plural both are nouns.

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

poor (noun)	plural (noun)
people without possessions or wealth (considered as a group)	the form of a word that is used to denote more than one

poor (adjective)	plural (adjective)
having little money or few possessions	grammatical number category referring to two or more items or units
lacking in quality or substances	composed of more than one member, set, or kind
characterized by or indicating poverty
of insufficient quantity to meet a need
deserving or inciting pity