Coluber constrictor vs blacksnake

Coluber constrictor and blacksnake both are nouns.

Word	Noun	Adjective	Verb	Adverb
Coluber constrictor	Yes	No	No	No
blacksnake	Yes	No	No	No

As nouns, Coluber constrictor and blacksnake are synonyms defined as:

Coluber constrictor and blacksnake: blackish racer of the eastern United States that grows to six feet

Other synonyms of Coluber constrictor include black racer.

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