Basil the Great vs theologian

Basil the Great and theologian both are nouns.

Word	Noun	Adjective	Verb	Adverb
Basil the Great	Yes	No	No	No
theologian	Yes	No	No	No

Basil the Great (noun)	theologian (noun)
(Roman Catholic Church) the bishop of Caesarea who defended the Roman Catholic Church against the heresies of the 4th century; a saint and Doctor of the Church (329-379)	someone who is learned in theology or who speculates about theology