Simon Peter vs Peter

Simon Peter and Peter both are nouns.

Word	Noun	Adjective	Verb	Adverb
Simon Peter	Yes	No	No	No
Peter	Yes	No	No	No

As nouns, Simon Peter and Peter are synonyms defined as:

Simon Peter and Peter: disciple of Jesus and leader of the Apostles; regarded by Catholics as the vicar of Christ on earth and first Pope

Other synonyms of Simon Peter include Saint Peter, Saint Peter the Apostle, St. Peter, St. Peter the Apostle.

Simon Peter (noun)	Peter (noun)
disciple of Jesus and leader of the Apostles; regarded by Catholics as the vicar of Christ on earth and first Pope	disciple of Jesus and leader of the Apostles; regarded by Catholics as the vicar of Christ on earth and first Pope