The term 'Nasty Fall' can be broken down into four crossword solutions: HAIL (4 letters), HEADER (6 letters), SLEET (5 letters), and WIPEOUT (7 letters). HAIL is a form of precipitation that consists of small balls or lumps of ice. HEADER is a term used in sports to describe when a player uses their head to hit the ball. SLEET is a type of frozen rain that falls as a mixture of snow and rain. WIPEOUT is a term used to describe a sudden and complete loss or destruction. Together, these four words describe a nasty fall, which could refer to a stormy day with a combination of HAIL, SLEET, and rain, or a disastrous event that results in a complete loss.