national leader vs Mandela

national leader and Mandela both are nouns.

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

national leader (noun)	Mandela (noun)
a person who is a respected leader in national or international affairs	South African statesman who was released from prison to become the nation's first democratically elected president in 1994 (born in 1918)