cottonmouth moccasin vs Agkistrodon piscivorus

cottonmouth moccasin and Agkistrodon piscivorus both are nouns.

Word	Noun	Adjective	Verb	Adverb
cottonmouth moccasin	Yes	No	No	No
Agkistrodon piscivorus	Yes	No	No	No

As nouns, cottonmouth moccasin and Agkistrodon piscivorus are synonyms defined as:

cottonmouth moccasin and Agkistrodon piscivorus: venomous semiaquatic snake of swamps in southern United States

Other synonyms of cottonmouth moccasin include cottonmouth, water moccasin.

cottonmouth moccasin (noun)	Agkistrodon piscivorus (noun)
venomous semiaquatic snake of swamps in southern United States	venomous semiaquatic snake of swamps in southern United States