CROSSHAIR' The term CROSS, HAVING ENDLESS PAIN IN FACE can be solved by the 8-letter word 'CROSSHAIR'. A crosshair is a thin line that is used as a marker or reference point in an image, usually in the form of a plus sign or a circle with four lines extending from the center. It is commonly used in optical devices such as telescopes, microscopes, and cameras to help the user accurately align the device with the desired object. Crosshairs are also used in video games and other computer applications to indicate the current position of the mouse cursor.