Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
You'll also know a cottonmouth by the inside of its mouth, white is of course, white like cotton.
Source: https://kfyo.com/ixp/157/p/dont-panic-but-texas-is-home-to-15-venomous-types-of-snakes/