Rainfall
Part of speech: noun
Definition: the amount of rain that falls on a single occasion
Precipitation
Part of speech: noun
Definition: A hurried headlong fall.A reaction that leads to the formation of a heavier solid in a lighter liquid; the precipitate so formed at the bottom of the container.Any or all of the forms of water particles, whether liquid or solid, that fall from the atmosphere (e.g., rain, hail, snow or sleet). It is a major class of hydrometeor, but it is distinguished from cloud, fog, dew, rime, frost, etc., in that it must fall. It is distinguished from cloud and virga in that it must reach the ground.Unwise or rash rapidity; sudden haste.