The term ARENAS SPORTS refers to large, enclosed structures used for sporting events. The two crossword solutions for this term are DOME (4 letters) and STADIA (6 letters). Domes are typically constructed with a roof that is either partially or completely supported by air pressure, while STADIA are usually open-air structures with seating areas for spectators. Both types of arenas are used for a variety of sports, including football, basketball, baseball, and hockey.