national leader vs Gnaeus Pompeius Magnus

national leader and Gnaeus Pompeius Magnus both are nouns.

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

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