examples of roofs [4]
Roof: the covering of a building that rests on the frame and protects it from inclement weather.
conical broach roof 
Conical roof usually surmounting a turret.
hip-and-valley roof 
Roof formed where two gable roofs cross.
dome roof 
Roof covering a large dome that sometimes rises above the rest of the roof.
bell roof 
Roof covering the hollow semicircular vault of a building (dome).