Arks are containers designed to transport animals or goods on water or during a flood. Some synonyms for "arks" are boats, barges, rafts, and vessels. Boats come in various sizes, including small rowboats for individuals and large ships for commercial use. Like arks, boats can transport people, animals, or cargo. Barges are similar to boats but are typically flat-bottomed and used for transporting cargo on canals or rivers. Rafts are typically made of logs tied together and are used for transportation or recreation purposes. Finally, vessels are a general term that encompasses any type of watercraft, including ships, boats, and barges.