American football, playbook, play, player, coach, chalkboard, plan, line, diagram, chalk, string, running-back, hike, white, foot, ball, scrimmage, studio, drill, defense, blackboard, receive, drawing, lesson, team, dark, receiver, strategy, football, tackle, safety, design, quarterback, athlete, instruct, together, teach, sports, pass, rush, pigskin, contrast, back, running, drawn, offense, locker room, tactic
