uncle vs benefactor

uncle and benefactor both are nouns.

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

As nouns, benefactor is a hypernym of uncle; that is, benefactor is a word with a broader meaning than uncle:

uncle: a source of help and advice and encouragement
benefactor: a person who helps people or institutions (especially with financial help)

Other hypernyms of uncle include helper.

uncle (noun)	benefactor (noun)
the brother of your father or mother; the husband of your aunt	a person who helps people or institutions (especially with financial help)
a source of help and advice and encouragement