| Diabolism 1. (n.) Character, action, or principles appropriate to the devil. 2. (n.) Possession by the devil. Thesaurus Entries Black Mass, Satanism, black magic, chthonian worship, demonism, demonography, demonolatry, demonology, demonomancy, demonomy, demonry, devil lore, devil worship, devilry, diablerie, diabology, diabolology, sorcery, the black art | ![]() |