national leader vs 1st Earl of Balfour

national leader and 1st Earl of Balfour both are nouns.

Word	Noun	Adjective	Verb	Adverb
national leader	Yes	No	No	No
1st Earl of Balfour	Yes	No	No	No

national leader (noun)	1st Earl of Balfour (noun)
a person who is a respected leader in national or international affairs	English statesman; member of the Conservative Party (1848-1930)