What does "hellbender" mean?

A giant salamander (Cryptobranchus alleganiensis) of North America that inhabits large, swiftly flowing streams with rocky bottoms.

What is a synonym for "hellbender"?

Common synonyms include: amphibian, cryptobranchus alleganiensis, mud puppy.

noun

noun ·Rare ·Advanced level

Noun

1
A giant salamander (Cryptobranchus alleganiensis) of North America that inhabits large, swiftly flowing streams with rocky bottoms.
2
large salamander of North American rivers and streams wordnet
3
A reckless, headstrong person.

From hell + bender, possibly from hell-bent.