String course: It is a horizontal projecting course of masonry projecting out of the wall for shedding rainwater off the face.
Coping: It is a course placed upon the exposed top of an external wall to prevent the seepage of water.
Cornice: It is a projecting ornamental course near the top of a building or at the junction of a wall and ceiling.
Corbel: It is a projecting stone which is usually provided to serve as support for roof truss, beam, weather shed, etc.