candidate vs politico

candidate and politico both are nouns.

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

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

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

candidate (noun)	politico (noun)
someone who is considered for something (for an office or prize or honor etc.)	a person active in party politics
a politician who is running for public office