accidentally Synonyms

circumstantially by chance unexpectedly unintentionally incidentally unknowingly by the bye by luck capriciously en passant in passing indiscriminately haphazardly at random fortuitously as luck would have it aimlessly inadvertently spontaneously by mistake adventitiously unthinkingly by coincidence out of the clear blue sky as a by-product as side effect by happenstance not by design by a quirk of fate unsystematically unsuspectingly by accident coincidentally unconsciously for some reason remotely serendipitously stochastically unwittingly willy nilly whimsically desultorily dependently credulously contingently connectedly conditionally collaterally coincidental coincidence