politico vs politician

politico and politician both are nouns.

Word	Noun	Adjective	Verb	Adverb
politico	Yes	No	No	No
politician	Yes	No	No	No

As nouns, politico and politician are synonyms defined as:

Other synonyms of politico include pol, political leader.

politico (noun)	politician (noun)
a person active in party politics	a person active in party politics
	a leader engaged in civil administration
	a schemer who tries to gain advantage in an organization in sly or underhanded ways