The term 'Sudden Rush' can be described by four different crossword solutions: STAMPEDE (8 letters), SPATE (5 letters), SURGE (5 letters), and GUST (4 letters), and SALLY (5 letters). A STAMPEDE is a sudden rush of animals, usually in a panicked state. A SPATE is a sudden rush of something, such as water or people. A SURGE is an increase in the intensity or amount of something, such as electricity or emotion. A GUST is a sudden rush of wind. Finally, a SALLY is a sudden rush out of a defensive position, usually to attack.