17
by chance(expression, adjective, idiom, adverb, circumstance)
17
unintentionally(adverb, short, sudden, suddenly, casually)
12
incidentally
11
casually(adverb, circumstance, unexpectedly, chance 2, haphazardly)
11
unexpectedly(adverb, short, circumstance, unprepared, sudden)
7
perchance(adverb, chance 2)
7
by accident(expression, idiom, adverb, short, sudden)
7
circumstantially
6
fortuitously(adjective, adverb, unexpectedly, casually, fortunately)
6
inadvertently(adverb, short, sudden, suddenly, unexpectedly)
6
randomly
5
adventitiously
5
haphazardly
5
spontaneously
5
unawares(adverb, suddenly, unexpectedly)
5
unconsciously(adverb, short, sudden, suddenly, unexpectedly)
4
unwittingly(adverb, short, sudden, suddenly, unexpectedly)
4
accidental
4
aimlessly(adverb, unexpectedly, casually, haphazardly, erratically)
4
coincidentally(adverb, unintentionally)
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APASmart Define. (2015). accidentally thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/accidentally/thesaurus/synonyms
ChicagoSmart Define. 2015. "accidentally thesaurus" https://smartdefine.org/accidentally/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, accidentally thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/accidentally/thesaurus/synonyms>.
MLASmart Define. "accidentally thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/accidentally/thesaurus/synonyms>