Sudden runs is a term used to describe a situation in which a person or group of people suddenly start running. The term can be used to describe a variety of situations, such as when someone is running away from danger or when a group of people are running in a race. The crossword solution for this term is 'SPATES', which is a noun that refers to a sudden rush or outpouring of something. It can be used to describe a sudden rush of people running, or a sudden rush of emotions.