scholar vs doer

scholar and doer both are nouns.

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

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

scholar: someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs
doer: a person who acts and gets things done

Other hypernyms of scholar include actor, worker.

scholar (noun)	doer (noun)
a learned person; someone who by long study has gained mastery in one or more disciplines	a person who acts and gets things done
someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs
a student who holds a scholarship