national leader vs Lorenzo de' Medici

national leader and Lorenzo de' Medici both are nouns.

Word	Noun	Adjective	Verb	Adverb
national leader	Yes	No	No	No
Lorenzo de' Medici	Yes	No	No	No

national leader (noun)	Lorenzo de' Medici (noun)
a person who is a respected leader in national or international affairs	Italian statesman and scholar who supported many artists and humanists including Michelangelo and Leonardo and Botticelli (1449-1492)