casual Synonyms

incidental occasional nonchalant informal random everyday accidental relaxed haphazard chance contingent daily perfunctory passing unplanned unforeseen natural effortless fortuitous friendly cursory superficial spontaneous impromptu unconcerned carefree laid-back easygoing unexpected careless insouciant semiformal one-dimensional extramarital adventitial unstructured out of doors clochard part-timer loose-fitting recreational aperiodic offstage blither nonjudgmental uncommitted shoestring unrehearsed offhanded off-the-cuff