door:a flat object that is used to close the entrance of something such as a room or building, or the entrance itself
noun:every the homes have doors
forest:a large area of land covered with trees and plants, usually larger than a wood, or the trees and plants themselves
noun:some times i have go to the forest
oar:a long pole with a wide, flat part at one end, used for rowing a boat
noun:we use the oar in the kayak