Pompeii Fallout is a term used to describe the aftermath of the eruption of Mount Vesuvius in 79 AD. The eruption caused the destruction of the city of Pompeii and the surrounding area, leaving behind a layer of ASH and debris. The crossword solutions for the term 'Pompeii Fallout' are ASH (3 letters) and ASHES (5 letters). ASH is a fine powdery material composed of tiny particles of rock and organic matter that is created when something is burned. ASHES are the remains of something that has been burned.