The Acacia Tree is a type of tree that is found in many parts of the world. It is known for its hard wood and its fragrant yellow flowers. Three species of Acacia Tree are the Babul (5 letters), Koa (3 letters) and Brigalow (8 letters). The Babul is native to India and Pakistan, while the Koa is native to Hawaii and the Brigalow is native to Australia. All three species of Acacia Tree are known for their hard wood and fragrant yellow flowers.