Saint Joseph vs St Joseph

Saint Joseph and St Joseph both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saint Joseph	Yes	No	No	No
St Joseph	Yes	No	No	No

As nouns, Saint Joseph and St Joseph are synonyms defined as:

Saint Joseph and St Joseph: a Christian holy day, it is the feast day of St. Joseph, the husband of the Blessed Virgin Mary

Other synonyms of Saint Joseph include March 19.

Saint Joseph (noun)	St Joseph (noun)
a town in northwest Missouri on the Missouri River; in the 19th century it became the eastern terminus of the pony express	a Christian holy day, it is the feast day of St. Joseph, the husband of the Blessed Virgin Mary
a Christian holy day, it is the feast day of St. Joseph, the husband of the Blessed Virgin Mary