Ricky, Ricky, Ricky...I've lived in the States mostly since 1981 and for me there's only one term--it's football, the game in which you predominantly use your feet to play, unlike the American bastardization.
OK, admittedly I have to add "REAL football" so that my American friends don't get too confused, but most of them know me well enough to know what I'm talking about. I've also converted several to being fans of the mighty Yellows, known throughout N. Carolina as the greatest football team the world has ever known.