friend vs doer

friend and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
friend	Yes	No	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of friend; that is, doer is a word with a broader meaning than friend:

Other hypernyms of friend include actor, worker.

As nouns, doer is a hypernym of friend; that is, doer is a word with a broader meaning than friend:

Other hypernyms of friend include actor, worker.

friend (noun)	doer (noun)
a person you know well and regard with affection and trust	a person who acts and gets things done
a person with whom you are acquainted
an associate who provides cooperation or assistance
a person who backs a politician or a team etc.