12
accidental(adjective, deliberate, unwilling, unexpectedly)
6
unintentional(adjective, planned, unwilling)
6
involuntary(adjective, unwilling, automatic)
5
casual
5
eye-opening
5
fortuitous(adjective, lucky, accidental)
4
unplanned(adjective, deliberate, unwilling)
4
happy
4
inadvertent(adjective, accidental)
4
unwitting(adjective, conscious, realizing)
3
incidental
3
undesigned
2
chance
2
circumstantial
2
coincidental
2
extemporaneous
2
forced
2
haphazard(adjective, organization, plan)
2
instinctive
2
mechanic
11 years ago|1.8k views|share |citing 
APASmart Define. (2015). intentional thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/intentional/thesaurus/antonyms
ChicagoSmart Define. 2015. "intentional thesaurus" https://smartdefine.org/intentional/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, intentional thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/intentional/thesaurus/antonyms>.
MLASmart Define. "intentional thesaurus" 1 July 2015. Web. 24 September 2026. <https://smartdefine.org/intentional/thesaurus/antonyms>