Indoor games are a great way to have fun and stay active without having to go outside. Popular indoor games include POOL (4 letters), SQUASH (6 letters), BILLIARDS (9 letters), halma (5 letters) and pingpong (8 letters). POOL is a game played on a table with six pockets and sixteen balls, while SQUASH is a racquet sport played in an enclosed court. BILLIARDS is a game similar to POOL, but with three balls instead of sixteen. Halma is a board game for two to four players, and pingpong is a game played on a table with paddles and a small ball. All of these games are great for entertaining friends and family indoors.