Agkistrodon piscivorus vs cottonmouth

Agkistrodon piscivorus and cottonmouth both are nouns.

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

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

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

Other synonyms of Agkistrodon piscivorus include cottonmouth moccasin, water moccasin.

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