Hell hounds is a term that refers to supernatural dogs that are often associated with the underworld or the devil. These creatures can be found in many cultures and are known by several other names. The most common synonym for hell hounds is "black dogs," which are believed to be harbingers of death and misfortune. Other synonyms include "demon dogs," "hell beasts," and "infernal canines." These demonic creatures are often depicted as having flaming eyes and the ability to breathe fire. Some legends suggest that they are immune to physical harm and can only be defeated through magical means. Regardless of the name, hell hounds continue to fascinate and terrify people all over the world.