by chance Synonyms

unexpectedly accidentally by luck by happenstance out of the clear blue sky by coincidence by good luck unwittingly undesignedly serendipitously erratically unconsciously coincidentally do something by mistake by a happy chance by some chance completely by accident come uncalled coincidentallies as it may happen as if by accident as if accidentally by a stroke of luck by a piece of luck as things may turn out by a twist of fate by a mere chance by any chance by accident at every turn perhaps perchance might luckily haply fortunately confusedly circumstantially casually anyhow random randomly willy nilly as it happens adventitiously capriciously unknowingly at random fortuitously as luck would have it