impoverished vs needy

impoverished is not a noun while needy is a noun.

Word	Noun	Adjective	Verb	Adverb
impoverished	No	Yes	No	No
needy	Yes	Yes	No	No

As adjectives, impoverished and needy are synonyms defined as:

Other synonyms of impoverished include destitute, indigent, necessitous, poverty-stricken.

impoverished (noun)	needy (noun)
	needy people collectively

impoverished (adjective)	needy (adjective)
destroyed financially	demanding or needing attention, affection, or reassurance to an excessive degree
poor enough to need help from others	poor enough to need help from others