national leader vs Brezhnev

national leader and Brezhnev both are nouns.

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

national leader (noun)	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)