Saint Jude vs St. Jude

Saint Jude and St. Jude both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saint Jude	Yes	No	No	No
St. Jude	Yes	No	No	No

As nouns, Saint Jude and St. Jude are synonyms defined as:

Saint Jude and St. Jude: (New Testament) supposed brother of St. James; one of the Apostles who is invoked in prayer when a situation seems hopeless

Other synonyms of Saint Jude include Judas, Jude, Jude the Apostle, Thaddaeus.

Saint Jude (noun)	St. Jude (noun)
(New Testament) supposed brother of St. James; one of the Apostles who is invoked in prayer when a situation seems hopeless	(New Testament) supposed brother of St. James; one of the Apostles who is invoked in prayer when a situation seems hopeless