31 entries under unprepared topic. ×

10
spontaneous(noun, adjective, free, fake, informal)
9
extemporaneous(noun, adjective, impulsive, prepared, spontaneous)
9
unpremeditated(noun, adjective, free, impulsive, spontaneous)
8
impromptu(adjective, adverb, free, prepared, spontaneous)
8
unplanned(noun, adjective, free, impulsive, spontaneous)
5
impulsive(noun, adjective, violent, natural, fierce)
5
snap(noun, adjective, free, fake, informal)
5
unrehearsed(adjective, free, prepared, spontaneous)
4
ad-lib(adjective, prepared, spontaneous, impromptu)
4
off-the-cuff(adjective, informal, impulsive, prepared, spontaneous)
3
casual(adjective, free, informal, impulsive)
3
improvised(adjective, free, prepared, spontaneous)
2
free(adjective, informal, casual, impulsive)
2
improv(adjective, free, casual, spontaneous)
2
improviso(adjective, free, spontaneous, unplanned)
1
autoschediastic(adjective, free, casual, impulsive, spontaneous)
1
extemporized(spontaneous, unplanned, unrehearsed, unpremeditated)
1
played by ear(expression, idiom, unplanned, unrehearsed)
1
shot from the hip(expression, idiom, unplanned, unrehearsed)
1
toss off(expression, adjective, free, casual, impulsive)
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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>