The term 'crossover' can refer to a variety of different concepts. In the context of a crossword puzzle, the solutions for the term 'crossover' are STILE (5 letters), CASTLED (7 letters), SPAN (4 letters), and BRIDGE (6 letters). A STILE is a structure that allows people to cross over a fence or wall without having to climb it. Castled refers to a fortified structure, such as a castle, which is often used to protect a BRIDGE or other crossing point. A SPAN is the distance between two points, such as the SPAN of a BRIDGE. Finally, a BRIDGE is a structure that allows people to cross over a body of water or other obstacle.