national leader vs politico

national leader and politico both are nouns.

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

As nouns, politico is a hypernym of national leader; that is, politico is a word with a broader meaning than national leader:

national leader: a person who is a respected leader in national or international affairs
politico: a person active in party politics

Other hypernyms of national leader include pol, political leader, politician.

national leader (noun)	politico (noun)
a person who is a respected leader in national or international affairs	a person active in party politics