Flood zones are areas that are susceptible to flooding during heavy rain or natural disasters such as hurricanes or tsunamis. Synonyms for flood zone include flood-prone area, floodplain, flood-risk zone, floodway, inundation area, and high-water mark. These terms indicate areas that are at higher risk of flooding and require special consideration when it comes to building, insurance, and emergency preparedness. It is important to understand these terms and the risks associated with living in a flood zone to ensure the safety and well-being of individuals and communities.