English and North American English: grammatical, orthographical and lexical differences

At the level of educated speech and writing, there are relatively few differences in grammar and spelling between EngEng and NAmEng; those which do exist tend to be fairly trivial when considered from the point of view of mutual understanding. Vocabulary differences, on the other hand, are very numerous and are capable of causing varying degrees of comprehension problems. Each of these three areas will be discussed in turn below.