Avenue Shaders is a term used to describe the trees that line a street or avenue. The two crossword solutions for this term are ELMS (4 letters) and ELMTREES (8 letters). Elms are a type of deciduous tree that are native to Europe, Asia, and North America. They are known for their tall, straight trunks and their vase-shaped canopies. Elm trees are also popularly used as shade trees in urban areas.