55 entries under impromptu topic. ×

9
extemporaneous(adjective, adverb, simple, informal, natural)
9
extempore(adjective, simple, informal, natural, straightforward)
9
offhand(adjective, adverb, simple, natural, chance)
8
ad-lib(verb, adjective, adverb, produce, simple)
8
extemporary(adjective, prepared, spontaneous, unprepared)
7
improvised(adjective, adverb, simple, informal, natural)
7
unrehearsed(adjective, impulsive, prepared, unplanned)
5
spur-of-the-moment(adjective, impulsive, prepared, spontaneous, unprepared)
4
snap(adjective, prepared, spontaneous, unprepared)
4
spontaneous(adjective, simple, informal, natural, straightforward)
3
makeshift(adjective, informal, spontaneous, offhand, unprepared)
3
unplanned(adjective, simple, informal, natural, chance)
3
unprepared(adjective, informal, spontaneous, unplanned)
2
automatic(adjective, simple, natural, casual, impulsive)
2
casual(adjective, simple, easy, plain, natural)
2
expedient(adjective, spontaneous, unprepared, unrehearsed)
2
free(adjective, simple, natural, straightforward, casual)
2
immediate(adjective, spontaneous, unprepared, unrehearsed)
2
unpremeditated(adjective, chance, spontaneous, unprepared)
2
unstudied(adjective, simple, natural, casual, impulsive)
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APASmart Define. (2015). off-the-cuff thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/off-the-cuff/thesaurus/synonyms
ChicagoSmart Define. 2015. "off-the-cuff thesaurus" https://smartdefine.org/off-the-cuff/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, off-the-cuff thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/off-the-cuff/thesaurus/synonyms>.
MLASmart Define. "off-the-cuff thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/off-the-cuff/thesaurus/synonyms>