Synonyms for hellhound

Is this your discipline, when you should be as silent as cats in a kitchen, hellhound!

A thrilling struggle ensued between Merton and the hellhound of justice.

The Leipsic hellhound thus consigned to Belzebub was, of course, Peters.

What mysterious enemy pursued him, or rather pursued the monarchy like a hellhound?

Barricading serves not: fly fast, ye Bodyguards; rabid Insurrection, like the hellhound Chase, uproaring at your heels!