The 1,000 words which cause most spelling problems and slip-ups have been listed in the new edition of the Bloomsbury English Dictionary.
The mis-spelt words will have a line put through them, and the reader will be shown how they're really written.
The list was drawn up by a group of English teachers and professors.
The dictionary contains 400,000 definitions of what words mean, with 12,000 new entries.
Meanwhile, the BBC are on the hunt for the nation's top speller, with a spelling gameshow called Hard Spell, which hits your TVs on 29 November.