marcionitism/ˈmɑːʃiənɪˌtɪzm/marcionitism means synonym of Marcionism. Lexicurio rates it Sui generis — a strength score of 87 out of 100.marcionitism is pronounced /ˈmɑːʃiənɪˌtɪzm/.EtymologyFrom Marcionite + -ism.nounSynonym of Marcionism.