Words beginning with J. Jackpot! You've just landed in the jagging jujitsu ring of the letter J! Words starting with J love to jump to the rescue but can sometimes be overlooked. Our jazzed up guide to the letter J: words beginning with J, is the absolute juxtaposition you have needed to step up your Scrabble and words with Friends level! Be sure to check out our other juicy lists: words that end in J and words with J!