The Venomous African Tree Snake is also known as the Mamba, which is a five letter word. The Mamba is a highly venomous snake found in various parts of Africa, including the Democratic Republic of Congo, Kenya, Tanzania, and Zimbabwe. It is a long, slender snake that can grow up to 4.5 meters in length and is usually found in trees or bushes. Its venom is powerful enough to kill an adult human within 20 minutes, making it one of the most dangerous snakes in the world.