Barghest is a supernatural creature commonly known as a ghostly black dog that appears in folklore across various parts of the world. This beast is often associated with death and is said to be a harbinger of doom. There are several other words that can be used as synonyms for the barghest such as black dog, ghostly apparition, hellhound, phantom, specter, wraith, and demon dog. Each of these words conveys a sense of fear and horror, making them effective in describing the barghest and other similar monstrous entities. Overall, synonyms for the word barghest generally evoke an eerie, unsettling feeling in the reader or listener.