adventitious
I
adjective
accidental, acquired, casual, circumstantial, external, extraneous, extrinsic, extroverted, foreign, fortuitous, incidental, outward, outward-looking, random, subordinate, subsidiary, transcendent, unintentional, unwitting
II
index
fortuitous, haphazard, unintentional, unwitting
Burton's Legal Thesaurus.
William C. Burton.
2006