socialist vs politician

socialist and politician both are nouns.

Word	Noun	Adjective	Verb	Adverb
socialist	Yes	Yes	No	No
politician	Yes	No	No	No

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

Other hypernyms of socialist include pol, political leader, politico.

socialist (noun)	politician (noun)
a political advocate of socialism	a person active in party politics
	a leader engaged in civil administration
	a schemer who tries to gain advantage in an organization in sly or underhanded ways

socialist (adjective)	politician (adjective)
advocating or following the socialist principles