High water is a term used to describe the highest level of a body of water, such as a lake or sea. The two crossword solutions for this term are SEAS and LAKETITICACA. SEAS is an acronym for the Salinity, Evaporation, Atmospheric Pressure, and Sea Level, which are all factors that affect the level of a body of water. LAKETITICACA is the name of the highest navigable lake in the world, located in the Andes Mountains between Peru and Bolivia.