serendipity
definition
the occurrence of events by chance in a happy or beneficial way
example
Finding the perfect job just when I needed it was a moment of serendipity that changed my life for the better.
synonyms
flukecoincidencechance
word origin — The word 'serendipity' was coined by Horace Walpole in 1754, derived from 'The Three Princes of Serendip', a Persian fairy tale about three princes who made discoveries by accidents and sagacity.