Cottonmouths is a common name for venomous water snakes found in North and South America. These snakes are known for their signature white mouth, which resembles a cotton ball. While the name "cottonmouths" is widely used, there are several other synonyms for these snakes. Some of the most common synonyms include water moccasins, black snakes, and swamp adders. Other names include trap-jaws, gaper, and viperine water snake. While these synonyms may not be as well-known as cottonmouths, they are still frequently used by researchers, herpetologists, and those interested in snakes. Regardless of the name, cottonmouths are a fascinating and formidable creature.