Gospel of Mark vs Gospel According to Mark

Gospel of Mark and Gospel According to Mark both are nouns.

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

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

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

Other synonyms of Gospel of Mark include Mark.

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