The term 'COVERS, AS A LAWN' can be solved by the four-letter word 'SODS'. SODS are a type of grass turf that is used to cover lawns. It is made up of small pieces of grass and soil that are held together by the roots of the grass. The SODS are then laid down on the lawn and held in place with stakes or other materials. This type of grass turf is often used to create a more natural look for a lawn, as well as providing better drainage and protection from weeds.