Synonyms for By chance:

• adj.

  •casual (adjective)
  • un-expected,
  • more serendipitous,
  • un intentional,
  • un foreseen,
  • in-frequent,
  • un-foreseen,
  • un premeditated,
  • un-premeditated,
  • un expected,
  • un-intentional,
  • in frequent,
  • un planned,
  • most serendipitous,
  • un-planned.
  •hit or miss (adjective)
  • more haphazardly,
  • hit miss,
  • most haphazardly.
  •Other relevant words: (adjective)
  • occasional,
  • at random,
  • casual,
  • unexpected,
  • offhand,
  • irregular,
  • serendipitous,
  • hit or miss.

• adv

  •accidentally (adverb)
  • casually.
  •Other relevant words: (adverb)
  • haphazardly,
  • propitiously,
  • providentially,
  • opportunely,
  • luckily,
  • aimlessly,
  • randomly,
  • Inconstantly.

• adv.

  •all (adverb)
  • perchance,
  • by chance.
  •by accident (adverb)
  • unwittingly,
  • unexpectedly,
  • for some reason,
  • by coincidence,
  • fortuitously,
  • out of the clear blue sky,
  • unintentionally,
  • as luck would have it,
  • by a fluke,
  • by mistake.
  •casually (adverb)
  • un-intentionally,
  • in advertently,
  • un intentionally,
  • in-advertently.
  •haphazardly (adverb)
  • in-constantly,
  • in constantly.

• n.

  •accidentally (noun)
  • accidentally.
  •by chance (noun)
  • haply,
  • by luck,
  • circumstantially,
  • incidentally.
  •Other relevant words: (noun)
  • circumstance.

• Other synonyms:

  •
  • unnecessarily.
  •Other relevant words:
  • prospect,
  • on occasion,
  • unknowingly,
  • everyday,
  • ad libitum,
  • luck,
  • insurgent,
  • extemporaneous,
  • extemporary,
  • someways,
  • from time to time,
  • rakishly,
  • fortunately,
  • context,
  • ad-lib,
  • unlooked-for,
  • unpredictable,
  • by the way,
  • chance event,
  • condition,
  • stroke,
  • fortune,
  • ad lib,
  • unrehearsed,
  • effortless,
  • opportunity,
  • every which way,
  • nonchalantly,
  • freakishly,
  • guerilla,
  • perfunctory,
  • wantonly,
  • unforeseen,
  • extempore,
  • willy-nilly,
  • fortuity,
  • once in a while,
  • find,
  • encounter,
  • free-and-easy,
  • auspiciously,
  • run a risk,
  • periodically,
  • episodic,
  • unseen,
  • by the bye,
  • offhandedly,
  • maverick,
  • unorthodox,
  • heedlessly,
  • daily,
  • temporary,
  • hazard,
  • jerkily,
  • haphazard,
  • guerrilla,
  • licentiously,
  • prudently,
  • unanticipated,
  • risk,
  • off-the-cuff,
  • passing,
  • atypical,
  • gamble,
  • take chances,
  • offhanded,
  • setting,
  • insouciant,
  • at times,
  • periodic,
  • apropos,
  • raffishly,
  • incautiously,
  • second,
  • impromptu,
  • superficial,
  • now and again,
  • someway,
  • probability,
  • adventure,
  • chance,
  • bump,
  • cursory,
  • take a chance,
  • consideration,
  • nonchalant,
  • on an irregular basis,
  • happen.
  •Other relevant words (noun):
  • unpredictably,
  • spontaneously,
  • random,
  • now and then,
  • indefinitely,
  • at intervals,
  • capriciously,
  • unsystematically,
  • in snatches,
  • irregularly,
  • peradventure,
  • sporadically,
  • inadvertently,
  • at a venture,
  • in some way,
  • unmethodically,
  • fitfully,
  • carelessly,
  • arbitrarily,
  • Unpremeditatedly,
  • by fits,
  • sloppily,
  • accident,
  • spasmodically,
  • in spots,
  • Desultorily,
  • at haphazard,
  • indiscriminately,
  • by snatches,
  • somehow,
  • promiscuously,
  • serendipitously,
  • involuntarily,
  • adventitiously,
  • by accident,
  • occasionally,
  • as it chanced,
  • erratically.

Antonyms for By chance:

• adv.

  • Other antonyms:
    designedly, by design, deliberately, on purpose, purposely, advisedly, by choice.