3
unexpected(adjective, unplanned, unintentional, accidental, unintended)
3
unforeseen(adjective, unplanned, unintentional, accidental, unintended)
3
unthought(adjective, unplanned, unintentional, accidental, inadvertent)
2
erratic(adjective, unplanned, unintentional, accidental, inadvertent)
2
purposeless(adjective, unplanned, unintentional, accidental, inadvertent)
2
snap
2
spontaneous(accidental, unintended)
2
unstudied
1
adventitious(adjective, accidental, unintended)
1
automatic
1
gut
1
ill-advised
1
ill-considered
1
ill-devised
1
impulsive
1
indeliberate
1
instinctive
1
purposed
1
reflex
1
reflexive
11 years ago|1.8k views|share |citing 
APASmart Define. (2015). undesigned thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/undesigned/thesaurus/synonyms
ChicagoSmart Define. 2015. "undesigned thesaurus" https://smartdefine.org/undesigned/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, undesigned thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/undesigned/thesaurus/synonyms>.
MLASmart Define. "undesigned thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/undesigned/thesaurus/synonyms>