benefactress vs helper

benefactress and helper both are nouns.

Word	Noun	Adjective	Verb	Adverb
benefactress	Yes	No	No	No
helper	Yes	No	No	No

As nouns, helper is a hypernym of benefactress; that is, helper is a word with a broader meaning than benefactress:

benefactress: a woman benefactor
helper: a person who helps people or institutions (especially with financial help)

Other hypernyms of benefactress include benefactor.

benefactress (noun)	helper (noun)
a woman benefactor	a person who helps people or institutions (especially with financial help)
	a person who contributes to the fulfillment of a need or furtherance of an effort or purpose