A houseboat is a boat that has been designed or modified to be used primarily for regular dwelling. Most houseboats are not motorized, as they are usually moored or kept stationary, fixed at a berth, and often tethered to land to provide utilities. However, many are capable of operation under their own power.

A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size, shape, cargo or passenger capacity, or its ability to carry boats.