Gomorrahy?

We all know about Sodom & Gomorrah, right? They were both destroyed by God around the same time, purportedly for their wickedness. And surely we all know that the term sodomy comes from the name of Sodom. But what about gomorrahy? What's that? Is it even more unspeakably wicked than sodomy? Or is it just that Sodom's wickedness was purely sexual in nature, while Gomorrah's wickedness was based on something else, like greed, or pride, or murder, or whatnot? And because of our natural prurience, we tend to be more interested in the sodomy stuff, so the gomorrahy stuff has been lost to history? But I'll bet there are an awful lot of gomorrites out there, even if we no longer remember what that actually means.