Tree Logs Stacked in the Pile. Lumber. Wood that will be processed into beams and planks, a stage in the process of wood production. Additional keywords: forest, harvester, technology, timber, forestry, logging, harvesting, nature, tree, wood, trunk, outdoors, leaf, woodcutting, countryside, scene, pine, wooden, landscape, season, warehouse, environment, industry, material, cut, industrial, scenic, tall, coniferous. 12