Pius X vs Pope Pius X

Pius X and Pope Pius X both are nouns.

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

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

Pius X and Pope Pius X: pope who condemned religious modernism; he was canonized in 1954 because of his interest in the poor (1835-1914)

Other synonyms of Pius X include Giuseppe Melchiorre Sarto, Giuseppe Sarto.

Pius X (noun)	Pope Pius X (noun)
pope who condemned religious modernism; he was canonized in 1954 because of his interest in the poor (1835-1914)	pope who condemned religious modernism; he was canonized in 1954 because of his interest in the poor (1835-1914)