Mark vs Gospel of Mark

Mark and Gospel of Mark both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mark	Yes	No	No	No
Gospel of Mark	Yes	No	No	No

As nouns, Mark and Gospel of Mark are synonyms defined as:

Mark and Gospel of Mark: the shortest of the four Gospels in the New Testament

Other synonyms of Mark include Gospel According to Mark.

Mark (noun)	Gospel of Mark (noun)
the shortest of the four Gospels in the New Testament	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