Snake is a word that describes a long, legless reptile with a scaly skin. There are various synonyms to describe snakes. One common synonym for snake is serpent, which is derived from the Latin word 'serpens.' Another synonym is viper, which is often used to describe venomous snakes. A cobra is another type of venomous snake and can be used interchangeably with viper. Other synonyms for the word "snake" include boa, python, and anaconda, which are all species of large, non-venomous snakes. In colloquial language, some people will refer to a sly or deceitful person as a snake, which portrays the reptile's sneaky nature.