necessitous vs needy

necessitous is not a noun while needy is a noun.

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

As adjectives, necessitous and needy are synonyms defined as:

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

necessitous (noun)	needy (noun)
	needy people collectively

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