I've been down that road in these parts, and can say you won't get very far.

Americans love their football and will defend their right to call it football, regardless of the facts that the feet aren't really used much, the "ball" doesn't even match the dictionary definition of ball, and that at the time of naming it another sport already had that name. My theory is that Americans suck at real football so badly, they had to adapt another sport and give it that name, then call the real thing "soccer" and declare it a woman's sport, just to save face in their own sort of way. In America, "football" is the height of testosterone driven sporting, of course, the rest of the world knows what's up and sniggers at this with eyes rolling.

I prefer to call American football "American Padded Rugby". It is like rugby, but for Americans, and with protective equipment to limit booboos.