There is something unusual about these words, see if you can figure it out. The answer is below...but don't peek until you've given it a good shot!
OK, see if you can figure out what these words have in common....... Are you peeking or have you already given up?
In all of the listed words, if you take the first letter, place it at the end of the word, and then spell the word backwards, it will be the same word. Did you figure it out?