The word "ghoulies" is a term used to describe supernatural creatures or entities that are often associated with death and the afterlife. Synonyms for this word include goblins, spirits, demons, and specters. These words convey a sense of otherworldliness or a spiritual presence that is not typically associated with the living world. Other related words include phantoms, wraiths, poltergeists, and apparitions, which all describe similar kinds of supernatural entities. While many of these words may seem frightening or even terrifying, they are often used in literature and entertainment to create a sense of mystery and the unknown, rather than to instill fear.