36 entries under improvised topic. ×

17
extemporaneous(adjective, adverb, impulsive, prepared, spontaneous)
14
impromptu(adjective, free, impulsive, prepared, spontaneous)
12
offhand(adjective, adverb, free, impulsive, prepared)
11
extempore(adjective, free, prepared, spontaneous, impromptu)
10
spontaneous(adjective, free, impulsive, unprepared, impromptu)
9
unprepared(adjective, free, ready, spontaneous, impromptu)
7
ad lib(expression, adjective, idiom, adverb, free)
6
spur-of-the-moment(adjective, free, prepared, spontaneous, unprepared)
6
unplanned(adjective, free, informal, casual, unqualified)
6
unpremeditated(adjective, free, impulsive, spontaneous, unprepared)
6
unstudied(adjective, free, casual, impulsive, spontaneous)
3
makeshift(adjective, free, informal, casual, spontaneous)
2
ad hoc(expression, adjective, idiom, free, casual)
2
improv(adjective, adverb, free, spontaneous, unprepared)
2
improviso(adjective, free, casual, spontaneous, unprepared)
2
snap(adjective, free, informal, casual, impulsive)
1
at first glance(expression, idiom, free, informal, snap)
1
automatic(adjective, free, casual, impulsive, spontaneous)
1
by ear(expression, free, casual, offhand, impromptu)
1
casual(adjective, free, impulsive, spontaneous, unprepared)
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APASmart Define. (2015). unrehearsed thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/unrehearsed/thesaurus/synonyms
ChicagoSmart Define. 2015. "unrehearsed thesaurus" https://smartdefine.org/unrehearsed/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, unrehearsed thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/unrehearsed/thesaurus/synonyms>.
MLASmart Define. "unrehearsed thesaurus" 14 April 2015. Web. 1 October 2026. <https://smartdefine.org/unrehearsed/thesaurus/synonyms>