For the past few days, I've been working on a document that required me to use a word "fae" a bunch of times. At first, Mac OS X corrected this to "far", but today, I noticed that when I type "fae", it no longer auto corrects, and it no longer automatically corrects back to "far". Is there a way that I can revert it to where the word goes back to "far" when I type it? Thank you.