A built-in bed is a popular feature in many homes. It is a bed that is integrated into the design of a room and is often customized to fit the space. There are several synonyms for a built-in bed including a wall bed, a murphy bed, a hideaway bed, and a panel bed. A wall bed is a bed that is built into a wall and can be folded up and hidden when not in use. A murphy bed is similar to a wall bed but is hinged at one end and can be stored vertically. A hideaway bed is a bed that is stored under a platform or in a closet. A panel bed is a bed that is built into a wall and has a decorative panel covering the mattress.