Synonyms to for some reason

by chance, accidentally, as it chanced, at haphazard, at intervals, at random, by a fluke, by accident, by fits, by good fortune, by hazard, by snatches, capriciously, carelessly, casually, desultorily, erratically, fitfully, fortuitously, haphazardly, hit or miss, in snatches, in some way, in spots, incidentally, indiscriminately, irregularly, perchance, promiscuously, randomly, sloppily, somehow, somehow or other, spasmodically, sporadically, unmethodically, unpredictably, unsystematically, a propos, apropos, apropos of, by the by, by the way, en passant, for example, in passing, par exemple, parenthetically, speaking of, conceivably, feasibly, haply, imaginably, it may be, maybe, perhaps, possib