The term 'hat holder' can be broken down into four crossword solutions: HEAD (4 letters), BANDBOX (7 letters), RACK (4 letters), and TREE (4 letters). A HEAD is the part of the body that contains the brain, eyes, ears, nose, and mouth. A BANDBOX is a type of box used to store hats and other items of clothing. A RACK is a structure used to hang items such as hats. Finally, a tree is a tall plant with a trunk and branches. All of these solutions can be used to describe a hat holder, which is an object used to store hats.