The term 'Cottonmouth' is used to refer to two species of venomous snakes, the Agkistrodon piscivorus and the Agkistrodon contortrix. The former is commonly known as the Water Moccasin or Cottonmouth Moccasin, while the latter is known as the Copperhead or High-Backed Copperhead. The crossword solutions for the term 'Cottonmouth' are 'FANG' (4 letters) and 'Watermoccasin' (13 letters). The fangs of these snakes are their primary means of defense and they use them to inject venom into their prey. The Water Moccasin is a large, heavy-bodied snake that is found in swamps, marshes, and other wetland habitats. It is typically dark brown or black in color with a distinctive white mouth, hence its name.