Gospel According to Mark vs Gospel of Mark

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

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

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

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

Other synonyms of Gospel According to Mark include Mark.

Gospel According to 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