45 entries under improvised topic. ×

27
offhand(adjective, adverb, free, simple, fake)
27
unprepared(adjective, adverb, free, ready, spontaneous)
24
extemporaneous(adjective, adverb, simple, informal, natural)
24
extempore(adjective, adverb, free, simple, fake)
22
spontaneous(adjective, adverb, free, impulsive, willing)
17
unrehearsed(adjective, free, impulsive, prepared, spontaneous)
14
unpremeditated(adjective, adverb, free, impulsive, planned)
14
unplanned(adjective, free, simple, fake, informal)
13
off the cuff(expression, adjective, idiom, adverb, free)
13
ad-lib(noun, adjective, adverb, free, simple)
12
makeshift(adjective, adverb, free, spontaneous, unprepared)
11
casual(adjective, free, simple, fake, natural)
10
spur-of-the-moment(adjective, adverb, free, prepared, spontaneous)
9
unstudied(adjective, adverb, free, simple, fake)
9
improviso(adjective, adverb, free, impulse, spontaneous)
6
ad hoc(expression, adjective, idiom, free, unplanned)
6
extemporization(noun, planned, prepared, improvisation)
6
improvisation(noun, planned, impulse, prepared)
5
extemporized(adjective, adverb, informal, unprepared, unplanned)
5
improv(adjective, adverb, free, offhand, unprepared)
<123>
10 years ago|12k views|share |citing 
APASmart Define. (2016). impromptu thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impromptu/thesaurus/synonyms
ChicagoSmart Define. 2016. "impromptu thesaurus" https://smartdefine.org/impromptu/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, impromptu thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impromptu/thesaurus/synonyms>.
MLASmart Define. "impromptu thesaurus" 28 January 2016. Web. 23 September 2026. <https://smartdefine.org/impromptu/thesaurus/synonyms>