Outside chances are possibilities or opportunities that are unlikely to happen or be successful. Antonyms for outside chances are words that represent possibilities or opportunities that are very likely to happen, guaranteed, or highly probable. For example, the antonyms for outside chances can be terms like certainties, guarantees, probabilities, or slam dunks. The antonyms offer a different perspective to outside chances, as they provide a sense of reliability and confidence in the outcome. So, while outside chances might hold some attraction for those who enjoy a challenge or risk, antonyms offer a more pragmatic and safe approach.