campaigner vs pol

campaigner and pol both are nouns.

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

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

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

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