Pius IX vs Pope Pius IX

Pius IX and Pope Pius IX both are nouns.

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

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

Pius IX and Pope Pius IX: Italian pope from 1846 to 1878 who in 1854 declared the dogma of the Immaculate Conception of the Virgin Mary

Other synonyms of Pius IX include Giovanni Maria Mastai-Ferretti, Giovanni Mastai-Ferretti.

Pius IX (noun)	Pope Pius IX (noun)
Italian pope from 1846 to 1878 who in 1854 declared the dogma of the Immaculate Conception of the Virgin Mary	Italian pope from 1846 to 1878 who in 1854 declared the dogma of the Immaculate Conception of the Virgin Mary