Defintions

capitalism- : an economic system characterized by private or corporate ownership of capital goods, by investments that are determined by private decision, and by prices, production, and the distribution of goods that are determined mainly by competition in a free market

communism- a : (classlist society) a theory advocating elimination of private property

b : a system in which goods are owned in common and are available to all as needed

free enterprise-: freedom of private business to organize and operate for profit in a competitive system without interference by government beyond regulation necessary to protect public interest and keep the national economy in balance

free market-  : an economic market operating by free competition

citation-

http://www.merriam-webster.com/dictionary/