Original Post
In my RPG I use the word "equipable" somewhere. I don't know which is the correct spelling however: equipable or equippable? I tried dictionary.com but it has neither words. I tried google, and both equipable and equippable return around 25k results, so it seems the Internet also doesn't know the spelling. Is there a rule in the English language for letter doubling when adding -able to a word? P.S. by "the Internet" I mean the people who use it of course ;)