Go to the University of Chicago LSJ lexicon. It has a search page which lets you search in either Greek or English, and find words starting with a specific pattern, ending in a specific pattern, ktl. You can also click on the link in the returned entry for any word which is titled A Greek-English Lexicon; Machine readable text
...It will bring you to an alphabetical word list. http://perseus.uchicago.edu/Reference/LSJ.html
This is the most useful online Dictionary. Although it does not provide parsing information like the Perseus.Tufts.edu LSJ lexicon does. Also, sometimes the Middle LSJ has a listing for a word that is buried somewhere in a massive LSJ (the big one) lexicon. So the Middle LSJ and the Big LSJ are two different creatures -- and both can help you at times.
A side note: TLG put its own version of LSJ online. After several days, they have taken it down because of hackers trying to penetrate the site. This was a very cool implementation of the LSJ lexicon. At this time it still seems to be offline.http://stephanus.tlg.uci.edu/lsjinfo/about.php