Timber is a term used to describe WOOD that has been cut and processed for use in construction and other purposes. A GROVE is a small group of trees, while TIMBERLAND is an area of land that is covered with trees and used for forestry. Rafters are structural beams used in the framework of a roof, while HARDWOOD is a type of WOOD that is more dense and durable than softwood. Trees are large plants with woody stems, while logs are pieces of WOOD that have been cut from a tree. Forests are large areas of land that are densely populated with trees, while beams are long, thick pieces of WOOD used in construction. Boards are thin, flat pieces of WOOD, while ESSENCE is the most concentrated form of a substance. LUMBER is WOOD that has been cut into boards or planks, while OAK is a type of HARDWOOD tree. WOOD is the material that comes from trees and is used for many different purposes.