St. Peter vs Simon Peter

St. Peter and Simon Peter both are nouns.

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

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

St. Peter and Simon 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 St. Peter include Peter, Saint Peter, Saint Peter the Apostle, St. Peter the Apostle.

St. Peter (noun)	Simon 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