Synonyms of fortuitous

1 Syllable

odd

2 Syllables

unmeant, chanced, lucky, random, flukier, breezer, driftless, fluky, aimless, luckiest, casual, odd-lot, chancing, happy, chancer, fluker, fluke, luckier, timeous, chance, cincher

3 Syllables

successful, objectless, possible, unneeded, unguided, unaimed, contingent, bestselling, haphazard, unplanned, surprising, by-the-way, lucky-dog, hit-or-miss

4 Syllables

unintended, fortunate, incidental, unrequired, inessential, unlooked-for, unpredicted, supervenient, circumstantial, uncalled-for, aleatory, adventitious, undesigned, accidental, conditional, arbitrary, unexpected, unforeseen, provisory, coincidental, providential, opportune

5 Syllables

unnecessary, unintentional, codicillary, serendipitous