Leo XIII vs Gioacchino Pecci

Leo XIII and Gioacchino Pecci both are nouns.

Word	Noun	Adjective	Verb	Adverb
Leo XIII	Yes	No	No	No
Gioacchino Pecci	Yes	No	No	No

As nouns, Leo XIII and Gioacchino Pecci are synonyms defined as:

Leo XIII and Gioacchino Pecci: Italian pope from 1878 to 1903 who was interested in the advancement of learning and who opened the Vatican secret archives to all scholars

Other synonyms of Leo XIII include Giovanni Vincenzo Pecci, Pope Leo XIII.

Leo XIII (noun)	Gioacchino Pecci (noun)
Italian pope from 1878 to 1903 who was interested in the advancement of learning and who opened the Vatican secret archives to all scholars	Italian pope from 1878 to 1903 who was interested in the advancement of learning and who opened the Vatican secret archives to all scholars