theologian vs Saint Athanasius

theologian and Saint Athanasius both are nouns.

Word	Noun	Adjective	Verb	Adverb
theologian	Yes	No	No	No
Saint Athanasius	Yes	No	No	No

theologian (noun)	Saint Athanasius (noun)
someone who is learned in theology or who speculates about theology	(Roman Catholic Church) Greek patriarch of Alexandria who championed Christian orthodoxy against Arianism; a church father, saint, and Doctor of the Church (293-373)