👉 Precipitance is a measure of how much moisture is present in an area. It can be defined as the difference between the height above sea level at which the precipitation occurs and the height below, so that it's not affected by local topography.
👉 Percipitation is a measure of the amount of water that falls or collects in a body of liquid, usually through a surface. It is used to describe the density and volume of water when it falls or collects on surfaces.