* Quite means something different. In British "quite good" is similar to "particularly good". In American it's more like "OK",
* Spelling of -ing form of words ending in l. Br: travelling, Am: traveling,
* Placement of stress on multi-syllable words. It almost seems like anything British people do is the opposite in America. Br: 'adult, a'ddress, ice 'cream. Am: a'dult, 'address, 'ice cream.