Racoon appeared as a common word in yesterday's 10 letter puzzle. I got it this time after missing it in an earlier puzzle. Dictionaries list it as a variant spelling of raccoon (which I presume is also common in Chi). It seems odd to me that a variant spelling would be classified as common. I've only ever seen it written as raccoon. As a general principle, I think most variant spellings should be classified as rare. Of course, there are no raccoons in my part of the world, so maybe racoon is a common variant elsewhere.