Casino games like roulette happen in one place and rely on chance. Gambling...

https://zanessmartcolumn.brightsora.com/posts/does-the-uk-gambling-commission-define-gambling-and-betting-differently

Casino games like roulette happen in one place and rely on chance. Gambling covers a broader range, including betting on events like football matches. Betting means predicting an outcome and risking money on it