philosopher vs scholar

philosopher and scholar both are nouns.

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

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

philosopher: a specialist in philosophy
scholar: a learned person; someone who by long study has gained mastery in one or more disciplines

Other hypernyms of philosopher include bookman, scholarly person.

philosopher (noun)	scholar (noun)
a specialist in philosophy	a learned person; someone who by long study has gained mastery in one or more disciplines
a wise person who is calm and rational; someone who lives a life of reason with equanimity	someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs
	a student who holds a scholarship