Agkistrodon piscivorus vs cottonmouth moccasin

Agkistrodon piscivorus and cottonmouth moccasin both are nouns.

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

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

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

Other synonyms of Agkistrodon piscivorus include cottonmouth, water moccasin.

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