If you often confuse "defense" and "defence," you have a good defense, since they are actually two spellings of the same word. We explain how they're used.
It will, say, include both defence/defense, and will honour only the "u" spellings of most words, but not all (e.g. colour / coloration), and in some case ignores certain "American" spellings, while at the same time rejecting British "-ise" spellings. We also have a Cana...