191 entries under adjective topic. ×

8
abrupt(impulsive, rash, unthinking)
8
hit-or-miss(insignificant, irregular, senseless, planned)
8
incidental(chance, casual, random, haphazard)
8
indiscriminate(insignificant, irregular, senseless, planned)
8
precipitate(noun, impulsive, rash, unthinking)
8
unforeseen(chance, lucky, unintentional, accidental)
8
unstudied(free, simple, fake, natural)
7
extempore(free, simple, fake, informal)
7
impetuous(noun, simple, natural, casual)
7
impulsive(noun, simple, violent, natural)
7
involuntary(noun, simple, natural, casual)
7
spur-of-the-moment(noun, free, impulsive, spontaneous)
6
desultory(insignificant, irregular, senseless, planned)
6
purposeless(insignificant, useless, extensive, erratic)
6
snap(noun, free, informal, casual)
6
sudden(noun, impulsive, rash, unthinking)
6
unconscious(simple, natural, casual, impulsive)
5
ad lib(expression, free, casual, unrehearsed)
5
aimless(insignificant, casual, irregular, senseless)
5
improvised(free, simple, fake, informal)
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APASmart Define. (2015). unplanned thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unplanned/thesaurus/synonyms
ChicagoSmart Define. 2015. "unplanned thesaurus" https://smartdefine.org/unplanned/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unplanned thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unplanned/thesaurus/synonyms>.
MLASmart Define. "unplanned thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/unplanned/thesaurus/synonyms>