benefactor vs helper

benefactor and helper both are nouns.

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

As nouns, benefactor and helper are synonyms defined as:

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

benefactor (noun)	helper (noun)
a person who helps people or institutions (especially with financial help)	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