The crossword solution for the term REGION ON A RISK BOARD is PERU, which is a four-letter word. Peru is a country located in western South America, bordered by Ecuador, Colombia, Brazil, Bolivia, and Chile. It is home to the ancient Incan Empire and is known for its diverse geography, including the Amazon rainforest, the Andes mountains, and the Pacific coastline. Peru is often featured on Risk boards due to its strategic location and its rich cultural heritage.