A NOOK is a small, secluded room, often found in the corner of a larger room. A CUBBY is a small, enclosed space, usually with shelves or drawers, used for storage. A DEN is a small room in a house, typically used as a study or private retreat. A DELL is a small, secluded valley, often wooded and surrounded by hills. A GLEN is a narrow valley, usually with a river running through it. An ALCOVE is a small recess or room, often found in the corner of a larger room. All of these terms refer to a small, secluded room, providing a private space for relaxation or work.