bibliographer vs scholar

bibliographer and scholar both are nouns.

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

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

bibliographer: someone trained in compiling bibliographies
scholar: a learned person; someone who by long study has gained mastery in one or more disciplines

Other hypernyms of bibliographer include bookman, scholarly person.

bibliographer (noun)	scholar (noun)
someone trained in compiling bibliographies	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