Coluber constrictor vs black racer

Coluber constrictor and black racer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Coluber constrictor	Yes	No	No	No
black racer	Yes	No	No	No

As nouns, Coluber constrictor and black racer are synonyms defined as:

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

Other synonyms of Coluber constrictor include blacksnake.

Coluber constrictor (noun)	black racer (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