Mis-chances are occurrences where something unfortunate or unexpected happens, often resulting in failure or disappointment. The antonyms for mis-chances would be successful opportunities or fortunate events. These are occurrences where things go as planned or turn out better than expected, leading to positive outcomes. Other antonyms for mis-chances could include good luck, serendipity, or providence. It is important to note that while mis-chances bring disappointment, they also present opportunities for learning and growth. As such, it is essential to approach both the mis-chances and their antonyms with an open mind and a willingness to adapt and improve.