Colubrid is a term used to describe a type of non-venomous snake. However, there are several other words that can be used as synonyms for this term, including "harmless snake," "rat snake," "garter snake," and "whipsnake." These terms all refer to species of snakes that lack venom, and are generally considered to be less dangerous than their venomous counterparts. In addition to these general terms, there are also many specific types of colubrid snakes, including the bull snake, the king snake, and the corn snake. Whether you are a snake enthusiast or just looking to expand your vocabulary, these synonyms can provide a useful tool for describing these fascinating creatures.