Mountain blacksnake is a term used to refer to a type of snake that is commonly found in mountainous regions. However, there are several other synonyms that can be used to describe this snake. One of the most common synonyms is the black racer, which is a reference to the snake's speed and agility. Other synonyms for the mountain blacksnake include eastern racers, black runners, and blue racers. These various synonyms are often used interchangeably depending on the specific region and the different species of snakes found there. Regardless of the term used, the mountain blacksnake is a fascinating and majestic creature that plays an important role in the ecosystem of mountainous regions.