The word "airboot" refers to a kind of medical boot that is designed to promote healing and immobilize the injured foot. However, there are several synonyms that can be used instead of "airboot" such as a medical walking boot, a walking cast, or a stability boot. These terms all refer to the same type of product which is commonly used by people who have suffered from a sprain, fracture, or other foot or ankle injuries. The differences between these terms are minor but can be useful in differentiating between specific products or brands. Whatever synonym is used, the important thing is that the airboot is effective in its intended purpose of providing support while allowing the injured person to maintain mobility.