mud puppy vs Cryptobranchus alleganiensis

mud puppy and Cryptobranchus alleganiensis both are nouns.

Word	Noun	Adjective	Verb	Adverb
mud puppy	Yes	No	No	No
Cryptobranchus alleganiensis	Yes	No	No	No

As nouns, mud puppy and Cryptobranchus alleganiensis are synonyms defined as:

mud puppy and Cryptobranchus alleganiensis: large salamander of North American rivers and streams

Other synonyms of mud puppy include hellbender.

mud puppy (noun)	Cryptobranchus alleganiensis (noun)
aquatic North American salamander with red feathery external gills	large salamander of North American rivers and streams
larval salamander of mountain lakes of Mexico that usually lives without metamorphosing
large salamander of North American rivers and streams