campaigner vs politico

campaigner and politico both are nouns.

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

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

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

campaigner (noun)	politico (noun)
a politician who is running for public office	a person active in party politics