coincidence

kəʊˈɪnsɪd(ə)ns

noun

a remarkable concurrence of events or circumstances without apparent causal connection.

it was a coincidence that she was wearing a jersey like Laura’s

accident,chance,serendipity,fate,a twist of fate,destiny,fortuity,fortune,providence,freak,hazard,a piece of good fortune,(a bit of) luck,(a bit of) good luck,a fluke,a happy chance,happenstance