An ELM (3 letters), a tree (4 letters), a PARASOL (7 letters), a BLIND (5 letters), and elms (4 letters) are all sources of shade. An ELM is a type of deciduous tree that is native to Europe, Asia, and North America. Trees provide shade through their leaves and branches. A PARASOL is an umbrella-like device that is used to provide shade from the sun. Blinds are window coverings that can be used to block out light and provide shade. Elms are a type of tree that is related to the ELM tree.