Gospels vs Gospel

Gospels and Gospel both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gospels	Yes	No	No	No
Gospel	Yes	No	No	No

As nouns, Gospels and Gospel are synonyms defined as:

Gospels and Gospel: the four books in the New Testament (Matthew, Mark, Luke, and John) that tell the story of Christ's life and teachings

Other synonyms of Gospels include evangel.

Gospels (noun)	Gospel (noun)
the four books in the New Testament (Matthew, Mark, Luke, and John) that tell the story of Christ's life and teachings	the four books in the New Testament (Matthew, Mark, Luke, and John) that tell the story of Christ's life and teachings