The term 'American Carnivorous Mammal' can be summarized by the crossword solution PEKAN, which is a five letter word. PEKAN is an American marten, a species of carnivorous mammal native to North America. It is a member of the Mustelidae family, which includes weasels, ferrets, and badgers. The American marten is a small, slender animal with a long tail and thick fur. It is an important part of the food chain in its natural habitat, preying on small animals such as rodents and birds.