1
fluky(chance, casual, random, haphazard, unplanned)
1
forward
1
frank
1
free(informal, casual, impulsive, spontaneous, unprepared)
1
gone off deep end(expression, idiom, passionate, violent, thoughtless)
1
guileless
1
half-baked
1
half-cocked
1
honest
1
hot-and-cold(passionate, violent, thoughtless, abrupt, impetuous)
1
ill-advised
1
ill-devised
1
immediate(noun, free, informal, casual, impulsive)
1
improvident
1
improvisate
1
improvise
1
incautious
1
indefinite
1
ingenuous
1
insensitive(careless, thoughtless, inconsiderate)
11 years ago|6.1k views|share |citing 
APASmart Define. (2015). unpremeditated thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unpremeditated/thesaurus/synonyms
ChicagoSmart Define. 2015. "unpremeditated thesaurus" https://smartdefine.org/unpremeditated/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unpremeditated thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unpremeditated/thesaurus/synonyms>.
MLASmart Define. "unpremeditated thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/unpremeditated/thesaurus/synonyms>