The crossword solution for the term BASEBALL, BUT NOT FOOTBALL is SPHERE. Baseball and football are two of the most popular sports in the United States. Baseball is played with a bat and a ball, while football is played with an oblong ball. The ball used in baseball is spherical in shape, while the ball used in football is more elongated. Therefore, the answer to the crossword clue is SPHERE, as it accurately describes the shape of the ball used in baseball.