theologian vs scholar

theologian and scholar both are nouns.

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

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

theologian: someone who is learned in theology or who speculates about theology
scholar: a learned person; someone who by long study has gained mastery in one or more disciplines

Other hypernyms of theologian include bookman, scholarly person.

theologian (noun)	scholar (noun)
someone who is learned in theology or who speculates about theology	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