Peak water is a term used to describe the point in time when the demand for water exceeds the available supply. This phenomenon is caused by factors such as population growth, climate change, and pollution. There are several synonyms for peak water, including water scarcity, water stress, water shortage, and water crisis. Water scarcity implies insufficient water resources to meet the needs of a population, while water stress suggests a situation where water sources are strained due to overuse. Water shortage, on the other hand, refers to a situation where the demand for water exceeds the available supply, while water crisis suggests a more severe situation where the lack of water leads to significant social, economic, and environmental impacts.