The term 'Fast Feline' refers to two of the fastest land animals in the world, the PUMA and the CHEETAH. The PUMA, also known as the Cougar or Mountain Lion, is a large cat native to the Americas and has four letters. The CHEETAH is a large feline found in parts of Africa and the Middle East and has seven letters. Both animals are known for their incredible speed, with the CHEETAH being the fastest land animal in the world.