or 'why the English language is so painful to learn'. Here are a few choice ones:
argument * Let's not argue about the loss of this verb's silent
before the suffix -ment.
bellwether
* Often misspelled "bellweather." A wether is a gelded ram, chosen to lead the herd (thus his bell) due to the greater likelihood that he will remain at all times ahead of the ewes.
consensus
* The census does not require a consensus, since they are not related.
guarantee
* I guarantee you that this word is not spelled like "warranty" even though they are synonyms.
its/it's
* The apostrophe marks a contraction of "it is." Something that belongs to it is "its."
misspell
* What is more embarrassing than to misspell the name of the problem? Just remember that it is mis + spell and that will spell you the worry about spelling "spell."
rhythm
* This one was borrowed from Greek (and conveniently never returned) so it is spelled the way we spell words borrowed from Greek and conveniently never returned.
until
* I will never stop harping on this until this word is spelled with an extra for the last time!
http://www.yourdictionary.com/library/misspelled.html