historiographer vs scholar

historiographer and scholar both are nouns.

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

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

historiographer: a person who is an authority on history and who studies it and writes about it
scholar: a learned person; someone who by long study has gained mastery in one or more disciplines

Other hypernyms of historiographer include bookman, scholarly person.

historiographer (noun)	scholar (noun)
a person who is an authority on history and who studies it and writes about it	a learned person; someone who by long study has gained mastery in one or more disciplines
	someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs
	a student who holds a scholarship