Words that start with UNDER and contain O are one thing. But what if you need the word to be exactly 12 characters long too? Don’t worry! Specific word lists exactly like that are only a few quick keystrokes and mouse clicks (or finger taps) away on WordFinder. But, you already know that, because you are looking precisely at a list of 12 letter words starting with UNDER and including O. These words could be your golden ticket to a super high-scoring play in your next Scrabble® game.