fortuitous
adjective
[ fɔːˈtjuːɪtəs ]
• happening by chance rather than intention.
• "the similarity between the paintings may not be simply fortuitous"
Similar:
chance,
unexpected,
unanticipated,
unpredictable,
unforeseen,
unlooked-for,
serendipitous,
casual,
incidental,
coincidental,
haphazard,
random,
accidental,
inadvertent,
unintentional,
unintended,
unplanned,
unpremeditated,
Origin:
mid 17th century: from Latin fortuitus, from forte ‘by chance’, from fors ‘chance, luck’.