Bay Window- A set of two or more windows that protrude out from the wall. The window is moved away from the wall to provide more light and wider views.
Casement Window- A window that opens by swinging inward or outward much like a door. Casement windows are usually vertical in shape but are often grouped in bands.
Clapboard- Also known as weatherboard or siding. Long, narrow boards overlapped to cover the outer walls. Used in colonial style frame houses.
Dormer- The setting for a vertical window in the roof. Called a gable dormer if it has its own gable or a shed dormer if a flat roof. Most often found in upstairs bedrooms.
Eaves- The portion of the roof that projects beyond the wall.
Fanlight- A semicircular or arched window above a door.
Palladian Window- A three part window featuring a large arched center and flanking rectangular sides.
Pediment- A triangular crown used over doors, windows, or porches. 
Portico- A large porch usually with a pedimented roof supported by classical columns or pillars.
Rafter- A roof beam sloping from the ridge to the wall. In most houses, rafters are only visible from the attic. In styles such as craftsman bungalows and some rustic contemporaries, they are exposed.
Sidelights- Windows on either side of the door.
Turrets- Small towers often at the corner of a building. 
