national leader vs Vladimir Putin

national leader and Vladimir Putin both are nouns.

Word	Noun	Adjective	Verb	Adverb
national leader	Yes	No	No	No
Vladimir Putin	Yes	No	No	No

national leader (noun)	Vladimir Putin (noun)
a person who is a respected leader in national or international affairs	Russian statesman who was twice president (2000, 2012) and prime minister (1999, 2008) of the Russian Federation; formerly director of the Federal Security Bureau (born in 1952)