The term 'Pirates' Domain' refers to the area of the OCEAN, seas, and open seas that pirates inhabit. OCEAN is a five-letter word meaning a large body of water that covers most of the Earth's surface and is divided into several principal areas. SEA is a three-letter word meaning a large body of salt water that is smaller than an OCEAN. SEAS is a four-letter word meaning a large body of salt water that is partially enclosed by land. OPENSEAS is an eight-letter word meaning the part of the OCEAN that is not enclosed by land.