Bitts are a device used on boats and ships to secure lines or ropes. They are typically metal posts or pillars, located at the bow and stern. However, there are several synonyms for bitts, including cleats, mooring posts, and docking posts. Cleats are similar to bitts, they are also used to secure ropes or lines, and come in a range of shapes and sizes. Mooring posts are typically larger and heavier than bitts, used for tying larger boats. Docking posts are similar in function to bitts, but are specifically designed for use at a dock, securing boats to prevent them from drifting away. Regardless of the name, these devices are essential for safe and secure boat operation.