As a proper noun Cerberus
is the giant three-headed dog who guards the entrance to Hades; and one of the many offspring of Echidna and Typhon.
As a noun hellhound is
a demonic dog of hell, typically of unnatural size, strength or speed, with black fur, glowing eyes, and ghostly or phantom characteristics.
hellhound
English
Alternative forms
* hell hound
* hell-hound
Noun
(
en noun)
(mythology) A demonic dog of hell, typically of unnatural size, strength or speed, with black fur, glowing eyes, and ghostly or phantom characteristics.
See also
* Cerberus
* Orthrus