cottonmouth moccasin vs cottonmouth

cottonmouth moccasin and cottonmouth both are nouns.

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

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

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

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

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