DiceWheel - you must have a dice game on this casino
BetFlexi - it associates me more of sports betting
CoinBettors - I am not sure about bettors word how is attractive
VegasPrize.com   - not strictly related to gambling
xCashout - also
WagersWallet - my choice, the least bad choice

Because is so hard to find one word .com domain, you must use two words. I would search for domains where first word something unique and yours but second word something recognizable. Like Windice, Bustadice, FortuneJack, Sportsbet
OP I am not sure how is smart to post here your domain name ideas. There are many domain retailers and if they find something interesting he will take it before you.