Ghoulishly is an adjective that refers to something that is morbid, macabre, or grotesque. There are several synonyms for this word that can be used interchangeably to convey the same meaning. Some examples include eerie, macabre, spooky, creepy, grotesque, gruesome, and horrifying. These words are often used to describe things that are associated with death, such as haunted houses, graveyards, or horror movies. They are also used to describe people or behaviors that are morbid or disturbing, such as a fascination with serial killers or other violent acts. Overall, these synonyms all carry a sense of darkness, horror, or unease, making them useful for creating a spooky or unsettling atmosphere.