I hope you do not mind me jumping in your thread? Fall is ambigious word for 2 reasons. Due to a lack of photosynthesis caused by a growing lack of daylight, causes leaves to age and fall off the tree in a protective measure. Then we have the great time debate about putting clocks back and forth, in this case we refer to the clocks going back as fall / falling back 1 hour, or Leap forward in the spring, as in Easter and rabbits leaping and playing in the warming meadows or warm commons or downs.
So what we have is fall to describe the act of dead leaves falling off desidous trees, because it's autumn and day light is shortening, and then of course because it is autumn we have the clocks going back. It would have been far easier for immigrants into the United States to say fall to both refer to the season and the clocks going back.
The American way of speaking English is actually what is called a phonemic, this means the person who see's something written down will attempt to say it, in the most simplest of forms. It had nothing to do with Noah Webster, who would later (during the 1800's) standardize the phonemic spelling of words as spoken entirely by Americans. The reason for this was two-fold. 1) British English was very different than it is today, it was more complex with nuances and grammar, which made it exceptionally difficult for foreigners at the time to learn to speak the language. 2) If there was a way to simplify the language, without the complex nuances and the advanced grammar, and if the language could be based on the way a word is spoken, rather than the way it was spelled. In British it was the other way around, which made it very difficult especially for Spanish speakers of the Language, of which the United States was made up of many Spanish settlers. American English as a language does not exist, because it's root language is English from the Mother country. Take for example Chilean, Mexican, Argentinan Spanish, they are all subtley different from the main langauge, but they are still recognizably Spanish. Each of these spanish languages, have their own colloquilism, mannerisms, way of saying words that are local variations of the main language. English is exactly like this, and the reason why America fell into the phonetic way of speaking English words, it was especially handy and exceptionally easy for foreigners whose mother tongue wasn't english, to pick it up with ease, because there was nothing to get in the way of how to spell the word. And because the Language was entirely phonetic, it was extremely easy to incorporate other words from foreign lands into the language too, without all this difficult and fussy way of spelling getting in the way of pronouncing words. Washing, Franklin would have spoken inpeccable British English and so would their first generation families, but American phonetism the way they spoke, would have flooded across the US within the first 5 or 6 years, and gone from coast to coast within 20/25 years these are only rough guesses of the time scales. The spanish would have refused to speak English, and we know that because of the evidence for it in the shape of documents and other important letters. It would take at least another 100 or so years before the Spanish would convert and become anglicized in terms of the english language, but americanized because that is what they became. In the mean time the speed at which the English language is evolving (immigrants in the UK, and Americans teaching English and popular tv/cinema / gaming culture) is astounding, there are now more American words in the British English dictionary in the last decade than there have ever been since it's inception / beginning).
I am really sorry for invading your forum thread and sticking my nose in, but i couldn't help it

At least you now know where the word fall comes from, and the reasonw why American's speak english differently from us. However since British English is evolving, and more and more American words are appearing in British English don't be surprised to see a complete reversal in the next couple of decades where pretty much most of words have been replaced by the phonetic types (because of the heavy immigration in the UK)