Elaphe obsoleta vs pilot blacksnake

Elaphe obsoleta and pilot blacksnake both are nouns.

Word	Noun	Adjective	Verb	Adverb
Elaphe obsoleta	Yes	No	No	No
pilot blacksnake	Yes	No	No	No

As nouns, Elaphe obsoleta and pilot blacksnake are synonyms defined as:

Elaphe obsoleta and pilot blacksnake: large harmless shiny black North American snake

Other synonyms of Elaphe obsoleta include black rat snake, blacksnake, mountain blacksnake.

Elaphe obsoleta (noun)	pilot blacksnake (noun)
large harmless shiny black North American snake	large harmless shiny black North American snake