The crossword solution for the term COVER IN FLAGSTONES is PAVE, which is a four-letter word. Paving is a process of covering an area with flagstones, which are flat stones used for paving pathways, patios, and other outdoor areas. Paving can be done in a variety of ways, including using mortar or concrete to hold the stones together. The end result is a durable and attractive surface that can last for many years.