I was going to say in my earlier comment that I probably didn't like it because it sounds like Uruk Hai, and the person in the comment below also said it. So safe to.say that's what most of your users will also think of. "Large ugly orc" is a terrible word association for an app even if you personally like it.

Have you tried searching for meaningful words in other languages? Kagi means key in Japanese, for example. I've had luck with this approach before.