accidental Synonyms

incidental fortuitous contingent casual occasional adventitious inadvertent serendipitous nonessential unexpected unforeseeable unlooked-for unmeant unwilled sixty-fourth note unwitting unimportant semibreve unessential undreamt semiquaver spiccato subordinate subsidiary superaddition supervenient supplementary tangential uncaused undirected undreamed unforeseen incidentally undesigned hit-or-miss unplanned unpredictable randomize unanticipated uncalculated unheralded unimagined unpredicted unthought unpremeditated unintended unintentional adventitial revelatory localised