Pius II vs Aeneas Silvius

Pius II and Aeneas Silvius both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pius II	Yes	No	No	No
Aeneas Silvius	Yes	No	No	No

As nouns, Pius II and Aeneas Silvius are synonyms defined as:

Pius II and Aeneas Silvius: Italian pope from 1458 to 1464 who is remembered for his unsuccessful attempt to lead a crusade against the Turks (1405-1464)

Other synonyms of Pius II include Enea Silvio Piccolomini, Pope Pius II.

Pius II (noun)	Aeneas Silvius (noun)
Italian pope from 1458 to 1464 who is remembered for his unsuccessful attempt to lead a crusade against the Turks (1405-1464)	Italian pope from 1458 to 1464 who is remembered for his unsuccessful attempt to lead a crusade against the Turks (1405-1464)