Flat-bottomed boats are a type of vessel that have a flat bottom and are used for various purposes. Bateaux, with seven letters, are a type of flat-bottomed boat that is typically used for pleasure cruising. Dories, with six letters, are a type of flat-bottomed boat that is traditionally used for fishing. SCOWS, with five letters, are a type of flat-bottomed boat that is used for carrying cargo. BARGES, with six letters, are a type of flat-bottomed boat that is used for transporting goods on rivers and canals. ARKS, with four letters, are a type of flat-bottomed boat that is used for carrying passengers and cargo.