do good vs benefit

do good is not a noun while benefit is a noun.

Word	Noun	Adjective	Verb	Adverb
do good	No	No	Yes	No
benefit	Yes	No	Yes	No

As verbs, do good and benefit are synonyms defined as:

do good (noun)	benefit (noun)
	something that aids or promotes well-being
	a performance to raise money for a charitable cause
	financial assistance in time of need

do good (verb)	benefit (verb)
be beneficial for	derive a benefit from
	be beneficial for