Synonyms for Fortuitously:

• adj.

  •accidentally (adjective)
  • fortuitously,
  • by mistake,
  • unwittingly.

• adv

  •by chance (adverb)
  • unexpectedly,
  • incidentally.

• adv.

  •accidentally (adverb)
  • causelessly,
  • fortunately,
  • accidentally,
  • fatally,
  • unintentionally,
  • randomly,
  • adventitiously,
  • aimlessly,
  • haphazardly.
  •by chance (adverb)
  • by coincidence,
  • by a fluke,
  • out of the clear blue sky,
  • for some reason.
  •fortunately (adverb)
  • blessedly,
  • favorably,
  • advantageously,
  • successfully,
  • auspiciously.
  •successfully (adverb)
  • Thrivingly,
  • swimmingly,
  • profitably,
  • strongly,
  • well,
  • victoriously,
  • Flourishingly,
  • prosperously,
  • triumphantly.

• n.

  •as luck would have it (noun)
  • as luck would have it.

• Other synonyms:

  •
  • unnecessarily.

Antonyms for Fortuitously:

• adv.

  • Other antonyms:
    unfortunately, regrettably, unluckily, alas.

Fortuitously Sentence Examples:

• He understood the Indian's dogged tenacity too well to think for a moment that the fugitives could have escaped him, even had he not ridden into Casement's camp as he so fortuitously had done.

• And later, to a mighty empire that has grown fortuitously, piecemeal, by the individual struggles of independent pioneers or isolated filibusters, he gives a unifying soul, a spirit, a mission.