national leader vs Jefferson Davis

national leader and Jefferson Davis both are nouns.

Word	Noun	Adjective	Verb	Adverb
national leader	Yes	No	No	No
Jefferson Davis	Yes	No	No	No

national leader (noun)	Jefferson Davis (noun)
a person who is a respected leader in national or international affairs	American statesman; president of the Confederate States of America during the American Civil War (1808-1889)