Aeneas Silvius vs Pope Pius II

Aeneas Silvius and Pope Pius II both are nouns.

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

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

Aeneas Silvius and Pope Pius II: 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 Aeneas Silvius include Enea Silvio Piccolomini, Pius II.

Aeneas Silvius (noun)	Pope Pius II (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)