capitalism vs capitalist economy

capitalism and capitalist economy both are nouns.

Word	Noun	Adjective	Verb	Adverb
capitalism	Yes	No	No	No
capitalist economy	Yes	No	No	No

As nouns, capitalism and capitalist economy are synonyms defined as:

capitalism and capitalist economy: an economic system based on private ownership of capital

capitalism (noun)	capitalist economy (noun)
an economic system based on private ownership of capital	an economic system based on private ownership of capital