serendipity

/ˌsɛrənˈdɪpəti/
noun
  1. The occurrence of events by chance in a happy or beneficial way.
    • Their meeting was a moment of serendipity that changed both their lives.
    • The discovery of penicillin was a famous example of serendipity in science.
    • Finding that book at the flea market was pure serendipity.
Antonyms