The term 'Large African Mammal' can be described by four different crossword solutions: HIPPOPOTAMUS (12 letters), ELEPHANT (8 letters), RHINOCEROS (10 letters), and HIPPO (5 letters). HIPPOPOTAMUS and Hippotamus are two different spellings of the same word. All four of these animals are native to Africa and are considered large mammals. Hippopotamuses, elephants, and rhinoceroses are all herbivores, while hippos are omnivores. All four animals are considered endangered species due to poaching and habitat destruction.