national leader vs William Gladstone

national leader and William Gladstone both are nouns.

Word	Noun	Adjective	Verb	Adverb
national leader	Yes	No	No	No
William Gladstone	Yes	No	No	No

national leader (noun)	William Gladstone (noun)
a person who is a respected leader in national or international affairs	liberal British statesman who served as prime minister four times (1809-1898)