Synonyms of serendipitous in English:

serendipitous


See US English definition of serendipitous

See UK English definition of serendipitous

adjective

1‘their diligent efforts were coupled with the joys of serendipitous discovery’

SYNONYMS
chance, accidental
lucky, fortuitous
unexpected, unanticipated, unforeseen, unlooked-for
coincidental
informal fluky