"Aqua pura" is a Latin term that refers to pure water. There are several synonyms for this phrase that can be used interchangeably. One of the most common synonyms is "distilled water," which is created by boiling water and condensing the steam. Another synonym is "deionized water," which has had all impurities removed through a chemical process. "Filtered water" is another synonym that refers to water that has been passed through a filter to remove impurities. "Purified water" and "ultra-pure water" are also synonymous with "aqua pura" and refer to water that has been treated or processed to remove any contaminants. These synonyms all refer to water that is free of any substances that can be harmful to human health.