hellbender vs Cryptobranchus alleganiensis

hellbender and Cryptobranchus alleganiensis both are nouns.

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

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

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

Other synonyms of hellbender include mud puppy.

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