4
unexpected(adjective, chance, unplanned, unintentional, accidental)
4
unforeseen(adjective, chance, intention, unplanned, unintentional)
3
extemporaneous(adjective, chance, unplanned, unintentional, accidental)
3
haphazard(adjective, unknowing, unaware, unplanned, unintentional)
3
reflex(ignorant, hidden, unconscious, unaware, oblivious)
3
reflexive(forced, unwilling, obligatory, compulsory)
3
uncaused
3
unstudied
2
adventitious(adjective, chance, unplanned, unintentional, accidental)
2
careless(adjective, thoughtless, inconsiderate)
2
erratic(adjective, chance, unplanned, unintentional, accidental)
2
forced(unwilling, obligatory, compulsory)
2
gut(ignorant, hidden, unconscious, unaware, oblivious)
2
heedless(adjective, careless, thoughtless, inconsiderate)
2
impulsive(adjective, rude, careless, chance, thoughtless)
2
inattentive(adjective, ignorant, hidden, unconscious, unaware)
2
incidental(adjective, chance, unplanned, unintentional, unpremeditated)
2
instinctive(adjective, rude, careless, thoughtless, unwise)
2
purposeless(adjective, unplanned, unintentional, accidental, inadvertent)
2
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APASmart Define. (2015). unintended thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unintended/thesaurus/synonyms
ChicagoSmart Define. 2015. "unintended thesaurus" https://smartdefine.org/unintended/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, unintended thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unintended/thesaurus/synonyms>.
MLASmart Define. "unintended thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/unintended/thesaurus/synonyms>