Gnaeus Pompeius Magnus vs national leader

Gnaeus Pompeius Magnus and national leader both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gnaeus Pompeius Magnus	Yes	No	No	No
national leader	Yes	No	No	No

Gnaeus Pompeius Magnus (noun)	national leader (noun)
Roman general and statesman who quarrelled with Caesar and fled to Egypt where he was murdered (106-48 BC)	a person who is a respected leader in national or international affairs