The term 'Diamond Corner' is a baseball term that refers to the four points of the diamond-shaped field: BASE, BAG, HOME, and firstbase. The crossword solutions for this term are BASE (4 letters), BAG (3 letters), HOME (4 letters), FIRSTBASE (9 letters), and HOMEPLATE (9 letters). These five points make up the Diamond Corner, which is the area of the field where the pitcher, catcher, first baseman, and third baseman stand during the game.