socialism vs political theory

socialism and political theory both are nouns.

Word	Noun	Adjective	Verb	Adverb
socialism	Yes	No	No	No
political theory	Yes	No	No	No

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

socialism: a political theory advocating state ownership of industry
political theory: an orientation that characterizes the thinking of a group or nation

Other hypernyms of socialism include ideology, political orientation.

socialism (noun)	political theory (noun)
a political theory advocating state ownership of industry	an orientation that characterizes the thinking of a group or nation
an economic system based on state ownership of capital