Hydromancy is a word that is not very commonly used in everyday language. It refers to the practice of divination or predicting the future through the use of water. Some synonyms for hydromancy include: water gazing, water divination, and aquamancy. Water gazing refers to the act of staring at water in order to gain insight or divine knowledge. Water divination is a similar activity, but it involves interpreting ripples, reflections, or other physical disturbances in water to gain information (similar to reading tea leaves). Finally, aquamancy is another term that is sometimes used to describe this practice, although it is less common than the others.