The corkwood tree, also known as a she-oak or casuarina, has several synonyms that reflect its unique characteristics. The first synonym is ironwood, which is due to the tree's hard and durable wood. Another synonym is beefwood, because early explorers noticed that the tree's wood resembled beef. The third synonym is horsetail tree, which refers to the tree's slender, segmented branches that resemble horse tails. Finally, some people refer to it as a Australian pine, although it is not actually a pine tree, but a member of the casuarinaceae family. These synonyms highlight the corkwood's diverse qualities and help to describe it in unique and interesting ways.