Synonyms of serendipitous

adjectiveBy serendipity; by unexpected good fortune.

• causelessHaving no obvious cause; fortuitous or inexplicable.
• unintentionalInadvertent; unwitting.
• accidental
• adventitiousAccidental, additional, appearing casually.
• by accidentAccidental; as the result of some unforeseen happening or series of events; unexpected; resulting from an event without...
• by the byIncidental; unplanned.
• casualHappening by chance.
• fortuitousHappening by fortune or chance; accidental, coincidental.
• incidental
• lippening UK, dialectalOccasional; accidental.
• occasional
• random
• unforeseen
• unintendedNot intended; unplanned.
• unplanned
• charmedHaving great good fortune, as though magically wrought.
• fortunate
• freakStrange, weird, unexpected.
• happyExperiencing the effect of favourable fortune; favored by fortune or luck; fortunate, lucky.
• luckyProducing, or resulting in, good fortune.
• providentialFortunate, as if occurring through the intervention of Providence.
• sonsy British, dialectalLucky; fortunate; thriving; plump.
• accidentary obsolete
• chanceable obsoleteHappening by chance; accidental.