The term FENCE OF DEFENSE can be summarized as a PALISADE, which is an 8-letter word. A PALISADE is a defensive structure made of wooden stakes or posts that are placed close together and used to form a barrier. Palisades were commonly used in the Middle Ages to protect castles and towns from attack. They were also used by Native Americans to protect their villages. Palisades are still used today in some parts of the world for security purposes.