machine politician vs pol

machine politician and pol both are nouns.

Word	Noun	Adjective	Verb	Adverb
machine politician	Yes	No	No	No
pol	Yes	No	No	No

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

machine politician: 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 machine politician include political leader, politician, politico.

machine politician (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