33 entries under unprepared topic. ×

17
extemporaneous(adjective, adverb, impulsive, prepared, spontaneous)
14
impromptu(adjective, free, impulsive, prepared, spontaneous)
10
improvised(adjective, adverb, free, impulsive, prepared)
10
spontaneous(adjective, free, impulsive, impromptu)
9
ad-lib(adjective, adverb, impulsive, prepared, spontaneous)
6
spur-of-the-moment(adjective, free, prepared, spontaneous)
6
unpremeditated(adjective, free, impulsive, spontaneous)
3
unscripted(adjective, spontaneous, impromptu, unplanned)
2
extemporized(adjective, informal, spontaneous, unplanned)
2
improv(adjective, adverb, free, spontaneous)
2
improviso(adjective, free, casual, spontaneous)
2
snap(adjective, free, informal, casual, impulsive)
1
automatic(adjective, free, casual, impulsive, spontaneous)
1
autoschediastic(free, casual, impulsive, spontaneous)
1
casual(adjective, free, impulsive, spontaneous)
1
expedient(free, informal, casual, impulsive, snap)
1
fake(adjective, free, casual, impulsive, spontaneous)
1
free(casual, impulsive, spontaneous, impromptu)
1
immediate(free, informal, casual, impulsive, snap)
1
improvisatory(free, informal, casual, impulsive, snap)
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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>