national leader vs Leonid Brezhnev

national leader and Leonid Brezhnev both are nouns.

Word	Noun	Adjective	Verb	Adverb
national leader	Yes	No	No	No
Leonid Brezhnev	Yes	No	No	No

national leader (noun)	Leonid Brezhnev (noun)
a person who is a respected leader in national or international affairs	Soviet statesman who became president of the Soviet Union (1906-1982)