Demonianisms refer to the beliefs, practices, or characteristics associated with demons or the devil. Synonyms for demonianisms could include satanism, devil worship, occultism, black magic, or demonology. Each of these terms refers to specific aspects of demonianism, such as the worship of Satan, the performance of rituals to summon demons, the use of magic to achieve one's desires, or the study of demonic entities. However, it's important to note that each of these terms can hold different connotations, and not everyone who practices any of these beliefs or characteristics may identify as a demonian.