Lignum-vitae is a rare and valuable hardwood tree that grows mainly in the Caribbean and South America. This tree is also known as Guayacán and Pockwood. The wood of this tree is dense, making it an excellent material for crafting high-precision tools, bearings, and pulleys. Other synonyms that are commonly used for the lignum-vitae tree include Greenheart, Ironwood, and Verawood. These names are in reference to the tree's strength and durability. However, due to extensive logging over the years, this tree is now quite rare, with many conservation efforts currently underway to protect it.