theologian vs St. Jerome

theologian and St. Jerome both are nouns.

Word	Noun	Adjective	Verb	Adverb
theologian	Yes	No	No	No
St. Jerome	Yes	No	No	No

theologian (noun)	St. Jerome (noun)
someone who is learned in theology or who speculates about theology	(Roman Catholic Church) one of the great Fathers of the early Christian Church whose major work was his translation of the Scriptures from Hebrew and Greek into Latin (which became the Vulgate); a saint and Doctor of the Church (347-420)