A very simple bad spellers online dictionary exists at Aspell. The site is simplistic in nature and pretty self-explanatory. Enter the word as you think it’s spelled in the “Word:” box and click go. If you use the default options, you should be fine, but if the word is really obscure, you can change the dictionary between “normal” and “huge” and the Suggestion Mode from “normal” to “bad spellers.” For bad spellers, obviously select “bad spellers.” That’s it! The web site returns a list of suggest words for you to pick from that might be the word you need.