BIG BOATS can be referred to as ARKS, which is a four-letter word. An ark is a large boat or ship, typically one that is built for carrying passengers or goods. The term is most commonly associated with the biblical story of Noah's Ark, in which God instructed Noah to build an ark to save himself and his family from a great flood. In modern times, ARKS are often used for recreational purposes, such as sailing, fishing, and cruising.