The term "demonomist" is not widely used in modern language. However, synonyms for this term could include words such as demonologist, demonographer, or demon hunter. These words denote individuals who study demons, their characteristics, origins and behaviors, or those who actively hunt and eliminate them. Synonyms for "demonologist" could include "occultist," "spiritualist," or "exorcist." "Demonographer" might be synonymous with "demon lore expert," while "demon hunter" could be replaced with "demon slayer," "demon exterminator," or "demon banisher." Overall, these terms denote individuals who possess knowledge or skills in dealing with demonic entities in various capacities.