socialist economy vs socialism

socialist economy and socialism both are nouns.

Word	Noun	Adjective	Verb	Adverb
socialist economy	Yes	No	No	No
socialism	Yes	No	No	No

As nouns, socialist economy and socialism are synonyms defined as:

socialist economy and socialism: an economic system based on state ownership of capital

socialist economy (noun)	socialism (noun)
an economic system based on state ownership of capital	a political theory advocating state ownership of industry
	an economic system based on state ownership of capital