/ Thesaurus / C Synonyms of cottonmouth moccasin Find synonyms for: Noun1. water moccasin, cottonmouth, cottonmouth moccasin, Agkistrodon piscivorus, pit viperusage: venomous semiaquatic snake of swamps in southern United StatesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language