Incidental Incidental synonyms accidental incidental and accidental casual incidental and casual nonessential incidental and nonessential chance incidental and chance secondary incidental and secondary random incidental and random fortuitous incidental and fortuitous accompanying incidental and accompanying adventitious incidental and adventitious minor incidental and minor Full list of synonyms (692) Incidental antonyms essential incidental and essential basic incidental and basic important incidental and important fundamental incidental and fundamental deliberate incidental and deliberate premeditated incidental and premeditated planned incidental and planned intentional incidental and intentional set incidental and set intended incidental and intended Full list of antonyms (88) Share this picture Share this image Share this picture Share this image