Sudden descent is a term used to describe a rapid and unexpected DROP in altitude. This can be caused by a variety of factors, such as turbulence, wind shear, or an aircraft malfunction. The crossword solutions for the term sudden descent are DROP (4 letters), SWOOP (5 letters), and TAILSPIN (8 letters). DROP implies a quick and abrupt decrease in altitude, while SWOOP suggests a more controlled and graceful descent. TAILSPIN, on the other hand, implies a rapid and uncontrolled descent, often associated with an aircraft losing control.