theologian vs Saint Augustine

theologian and Saint Augustine both are nouns.

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

theologian (noun)	Saint Augustine (noun)
someone who is learned in theology or who speculates about theology	a resort city in northeastern Florida; the oldest city in the United States
	(Roman Catholic Church) one of the great Fathers of the early Christian church; after a dramatic conversion to Christianity he became bishop of Hippo Regius in North Africa; St. Augustine emphasized man's need for grace (354-430)