National Communism is an extreme form of Economic Authoritarianism.
Communism is a theory and social system of a classless society in which all property is owned by the community as a whole [Interdependence].
Nationalism is a concept of identity which members of a particular nation may collectively feel based on a specific notions of political legitimacy (country, ethnie, class, religion...).
National Communism is the brand of communism that focuses on action within its borders (Nationalism) and tends to create a new social orders along party lines, therefore bringing Conformance to a higher level than International Communism.