national leader vs Augustus

national leader and Augustus both are nouns.

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

national leader (noun)	Augustus (noun)
a person who is a respected leader in national or international affairs	Roman statesman who established the Roman Empire and became emperor in 27 BC; defeated Mark Antony and Cleopatra in 31 BC at Actium (63 BC - AD 14)