A bomb shelter, also known as a fallout shelter, is typically an underground structure designed to protect inhabitants from the effects of nuclear blast waves, radiation, and fallout. However, there are various synonyms for this term that can be used when referring to different types of shelters. Some of these synonyms include blast shelter, protection bunker, emergency shelter, nuclear shelter, and survival shelter. These shelters can be made from concrete, steel, or even pre-existing structures such as basements or caves. Regardless of the name or type of shelter, the primary purpose remains the same: to provide a safe haven for individuals during times of crisis.