keratoacanthoma: skin tumor that grows rapidly (especially in older people) and resembles a carcinoma but does not spread; it usually disappears spontaneously, often leaving a scar
growth: (pathology) an abnormal proliferation of tissue (as in a tumor)
rain stick: a percussion instrument that is made from a dried cactus branch that is hollowed out and filled with small pebbles and capped at both ends; makes the sound of falling rain when tilted; origin was in Chile where tribesmen used it in ceremonies to bring rain