political hack vs pol

political hack and pol both are nouns.

Word	Noun	Adjective	Verb	Adverb
political hack	Yes	No	No	No
pol	Yes	No	No	No

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

political hack: a politician who belongs to a small clique that controls a political party for private rather than public ends
pol: a person active in party politics

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

political hack (noun)	pol (noun)
a politician who belongs to a small clique that controls a political party for private rather than public ends	a person active in party politics