accidentally Synonyms

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