Agitprop: Political propaganda, especially favoring communism and disseminated through literature, drama, art, or music.
Apparatchik: A member of a Communist apparat (an organization or existing power structure, especially a political one). It is often used in a derogatory way to refer to an unquestioningly loyal subordinate, especially of a political leader or organization.
Bolshevik: Bolsheviks were members of the left-wing majority group of the Russian Social Democratic Workers' Party that adopted Lenin's theses on party organization in 1903. This word is also used to refer to communists, and in disparaging terms, to people who are extreme radicals.