Saint Mark vs Mark

Saint Mark and Mark both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saint Mark	Yes	No	No	No
Mark	Yes	No	No	No

As nouns, Saint Mark and Mark are synonyms defined as:

Saint Mark and Mark: Apostle and companion of Saint Peter; assumed to be the author of the second Gospel

Other synonyms of Saint Mark include Mark the Evangelist, St. Mark.

Saint Mark (noun)	Mark (noun)
Apostle and companion of Saint Peter; assumed to be the author of the second Gospel	the shortest of the four Gospels in the New Testament
	Apostle and companion of Saint Peter; assumed to be the author of the second Gospel