national leader vs Vicomte de Chateaubriand

national leader and Vicomte de Chateaubriand both are nouns.

Word	Noun	Adjective	Verb	Adverb
national leader	Yes	No	No	No
Vicomte de Chateaubriand	Yes	No	No	No

national leader (noun)	Vicomte de Chateaubriand (noun)
a person who is a respected leader in national or international affairs	French statesman and writer; considered a precursor of the romantic movement in France (1768-1848)