The term 'Venomous African Snake' refers to two species of snakes found in Africa: the Mamba (5 letters) and the Horned Viper (11 letters). The Mamba is a highly venomous snake found in sub-Saharan Africa, and is considered one of the most dangerous snakes in the world. The Horned Viper is a species of viper found in North Africa and the Middle East, and is also highly venomous. Both species are known for their aggressive behavior and potent venom.