The Word Oreo IS a Word!

I'm sorry...but this is just unfortunate!

How can the word OREO not be an acceptable word?!

I was playing Words With Friends, with a friend of mine...of course, and I got this message.

And of all days, I got it today: March 6, 2012...which just happens to be the 100th birthday of Oreo, America's best selling cookie!

So tell me again...how is OREO not an acceptable word?!?!