Ghoulishness refers to the macabre, eerie, and creepy nature of things. There are many synonyms that can be used to describe this feeling, including spooky, sinister, macabre, frightful, eerie, creepy, and gruesome. Each of these words connotes a sense of darkness and horror, making them useful for describing horror movies, ghost stories, or any other scenario where a sense of foreboding is required. Whether you're writing a spooky story or simply trying to describe a particularly creepy scene, using one of these synonyms is sure to help you capture the feeling of ghoulishness in your writing.