Elaphe obsoleta vs blacksnake

Elaphe obsoleta and blacksnake both are nouns.

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

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

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

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

Elaphe obsoleta (noun)	blacksnake (noun)
large harmless shiny black North American snake	blackish racer of the eastern United States that grows to six feet
	large harmless shiny black North American snake