What is the difference between colonialism and colonization?

colonization: Go to and live permanently as part of a settlement in a foreign land that is inhabited; and converting the original inhabitants by renaming and altering: them; their land; their laws; their spirituality! A politically correct Word for kidnalling, and theft.

colonialism: 1. a policy in which a country rules other nations and develops trade for its own benefit. 2. As an -ism, belief; A self righteous justification for colonization.