national leader vs Colin Powell

national leader and Colin Powell both are nouns.

Word	Noun	Adjective	Verb	Adverb
national leader	Yes	No	No	No
Colin Powell	Yes	No	No	No

national leader (noun)	Colin Powell (noun)
a person who is a respected leader in national or international affairs	United States general who was the first African American to serve as chief of staff; later served as Secretary of State under President George W. Bush (born 1937)