The term LOCUST TREE is a type of tree that belongs to the family Fabaceae. It is also known as the ACACIA tree, which has 6 letters, the CAROB tree, which has 5 letters, and the Robinia tree, which has 7 letters. These trees are native to warm temperate and subtropical regions of the world and are often used for ornamental purposes. They have compound leaves and produce small yellow flowers. The fruit of the locust tree is edible and can be used in cooking.