Not meaning to derail the thread, but ... What typo blew up the space shuttle? Challenger was lost when managers in a rush to launch overrode the recommendations of Thiokol engineers. Columbia was lost when a piece of insulation struck the leading edge of the left orbiter wing at launch and the risk to the shuttle was not recognized by those in charge.
What if you mix up Ilium and Ileum? How about Malleus and Malleolus? These sound pretty similar, but rather are not.