Communism is an economic term describing a society in which all people are workers and all workers collectively own the means of production, and there is no use of markets or currency in exchange. While communist politics may vary, most communists have a stateless classless society as their end goal, but believe that it is necessary to seize state power and use state measures of force (including but not limited to executions, imprisonment and repression) to suppress bourgeois power.
Anarchist Communism is opposed to the State, including its use as a supposedly transitional phase toward an eventually stateless classless society.
Anarcho-communists tend to propose democratic self-organization of communes which co-organize in federations.