political boss vs politico

political boss and politico both are nouns.

Word	Noun	Adjective	Verb	Adverb
political boss	Yes	No	No	No
politico	Yes	No	No	No

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

political boss: a leader in a political party who controls votes and dictates appointments
politico: a person active in party politics

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

political boss (noun)	politico (noun)
a leader in a political party who controls votes and dictates appointments	a person active in party politics