Ugo Buoncompagni vs Pope Gregory XIII

Ugo Buoncompagni and Pope Gregory XIII both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ugo Buoncompagni	Yes	No	No	No
Pope Gregory XIII	Yes	No	No	No

As nouns, Ugo Buoncompagni and Pope Gregory XIII are synonyms defined as:

Ugo Buoncompagni and Pope Gregory XIII: the pope who sponsored the introduction of the modern calendar (1572-1585)

Other synonyms of Ugo Buoncompagni include Gregory, Gregory XIII.

Ugo Buoncompagni (noun)	Pope Gregory XIII (noun)
the pope who sponsored the introduction of the modern calendar (1572-1585)	the pope who sponsored the introduction of the modern calendar (1572-1585)