The term 'Linden' is a type of tree, and can be represented by four, three, four, and eight letter words respectively: Tree, Hal, Teil, and Limetree. The Linden tree is a species of Tilia, a genus of trees native to the Northern Hemisphere. It is also known as the Lime tree, and is often used for its medicinal properties. Hal is an old English word for a Linden tree, while Teil is a German word for the same.