Bound Bundle is a term used to describe a group of items that are held together. The term can be broken down into three parts: REAM (4 letters), SHEAF (5 letters), and BALE (4 letters). A REAM is a unit of paper, usually 500 sheets, that is bound together. A SHEAF is a bundle of stalks of grain or cut grass, bound together with a band. Finally, a BALE is a large bundle of material, such as hay, straw, or cotton, tightly bound with cords or wire. Together, these three terms describe a bundle of items that are securely bound together.