Serendipity
Part of speech: noun
Definition: An unsought, unintended, and/or unexpected discovery and/or learning experience that happens by accident and sagacity.
Example sentence: Serendipity is nice, but hoping for luck and the magic of happenstance shouldn't be an excuse for a lack of proactivity. I had to learn for myself that waiting isn't a life plan.
Synchronicity
Part of speech: noun
Definition: The state of being synchronous or simultaneous.Coincidences that seem to be meaningfully related; supposedly the result of "universal forces".