Pius II vs Pope Pius II

Pius II and Pope Pius II both are nouns.

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

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

Pius II 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 Pius II include Aeneas Silvius, Enea Silvio Piccolomini.

Pius II (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)