37 entries under improvised topic. ×

12
offhand(noun, adjective, free, prepared, spontaneous)
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)
7
extempore(adjective, free, prepared, spontaneous, impromptu)
6
unprepared(adjective, free, spontaneous, impromptu, unrehearsed)
6
unstudied(adjective, free, spontaneous, impromptu, unrehearsed)
5
snap(noun, adjective, free, fake, informal)
5
unrehearsed(adjective, free, prepared, spontaneous, unprepared)
4
off the cuff(expression, adjective, free, impromptu, unrehearsed)
3
automatic(adjective, free, informal, casual, impulsive)
3
casual(adjective, free, informal, impulsive, unprepared)
3
immediate(noun, adjective, free, informal, casual)
2
ad hoc(expression, adjective, free, casual, unrehearsed)
2
ad lib(expression, adjective, free, casual, unrehearsed)
2
expedient(adjective, free, informal, casual, snap)
2
fake(adjective, free, informal, casual, spontaneous)
2
free(adjective, informal, casual, impulsive, unprepared)
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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>