Forage storage is a term used to describe the storage of food for animals, such as hay, grain, and other feed. The two crossword solutions for this term are SILO (4 letters) and HAYRACK (7 letters). A SILO is a large, cylindrical structure typically made of concrete or metal, used to store grain or other materials. A hayrack is a structure used to store hay, usually consisting of a frame with a slatted bottom and sides, and sometimes a roof.