I don't really want to play the know-it-all fuck. But American Football originated from early versions of ... what the most of the World refers to as FOOTBALL or soccer. (And YES they really call soccer - FOOTBALL.)
Besides.. the Hippopotomonstrosesquippedaliophobia (I actually memorized this one years ago for hangman games. And I still know it..) is nothing more than a hoax. They used greek words to make a contradiction. It really is a satire. And DEFINITELY not a technical term. The actual term used in medical science is Sesquipedalophobia (Fear of long words).