Cause'less adjective 1. Self- originating; uncreated. 2. Without just or sufficient reason; groundless. « My fears are causeless and ungrounded. Denham. » Found on http://www.encyclo.co.uk/webster/C/39
fortuitousadjective having no cause or apparent cause; `a causeless miracle`; `fortuitous encounters--strange accidents of fortune`; `we cannot regard artistic invention as...uncaused and unrelated to the times` Found on https://www.encyclo.co.uk/local/20974