60 entries under adjective topic. ×

3
improvised(free, prepared, spontaneous, unprepared)
3
involuntary(noun, impulsive, unprompted)
3
rash(noun, impulsive, unthinking)
2
ad hoc(expression, free, casual, unrehearsed)
2
ad lib(expression, free, casual, unrehearsed)
2
expedient(free, informal, casual, snap)
2
fake(free, informal, casual, spontaneous)
2
free(informal, casual, impulsive, unprepared)
2
headlong(noun, quick, impulsive, rash)
2
improv(free, casual, spontaneous, unprepared)
2
improviso(free, spontaneous, unprepared, unplanned)
2
informal(free, spontaneous, impromptu, unrehearsed)
2
precipitate(noun, quick, impulsive, rash)
2
quick(noun, swift, sudden, rushed)
2
reckless(noun, impulsive, rash, unthinking)
1
abrupt(quick, impulsive, rash, unthinking)
1
autoschediastic(free, casual, impulsive, spontaneous)
1
by ear(expression, free, casual, unrehearsed)
1
coincidental
1
hasty(quick, impulsive, rash, unthinking)
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APASmart Define. (2015). spur-of-the-moment thesaurus. Retrieved October 2, 2026, from https://smartdefine.org/spur-of-the-moment/thesaurus/synonyms
ChicagoSmart Define. 2015. "spur-of-the-moment thesaurus" https://smartdefine.org/spur-of-the-moment/thesaurus/synonyms (accessed October 2, 2026).
HarvardSmart Define 2015, spur-of-the-moment thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/spur-of-the-moment/thesaurus/synonyms>.
MLASmart Define. "spur-of-the-moment thesaurus" 13 April 2015. Web. 2 October 2026. <https://smartdefine.org/spur-of-the-moment/thesaurus/synonyms>