Cryptobranchus alleganiensis vs hellbender

Cryptobranchus alleganiensis and hellbender both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cryptobranchus alleganiensis	Yes	No	No	No
hellbender	Yes	No	No	No

As nouns, Cryptobranchus alleganiensis and hellbender are synonyms defined as:

Cryptobranchus alleganiensis and hellbender: large salamander of North American rivers and streams

Other synonyms of Cryptobranchus alleganiensis include mud puppy.

Cryptobranchus alleganiensis (noun)	hellbender (noun)
large salamander of North American rivers and streams	large salamander of North American rivers and streams