93 entries under adjective topic. ×

26
impromptu(adverb, simple, plain, informal)
20
spontaneous(noun, plain, impulsive, willing)
19
unrehearsed(adverb, plain, impulsive, prepared)
18
offhand(noun, simple, natural, chance)
17
unpremeditated(noun, impulsive, planned, impulse)
17
unprepared(spontaneous, unprepared, impromptu, unplanned)
15
extempore(simple, informal, natural, chance)
13
extemporary(free, casual, impulsive, prepared)
13
improvised(simple, informal, natural, chance)
10
spur-of-the-moment(noun, impulsive, prepared, spontaneous)
10
ad-lib(simple, informal, natural, casual)
10
impulsive(noun, adverb, simple, natural)
9
informal(free, plain, casual, impulsive)
9
off-the-cuff(adverb, simple, informal, natural)
9
unplanned(noun, simple, informal, natural)
8
unstudied(simple, natural, casual, impulsive)
7
ad lib(expression, idiom, adverb, impulsive)
7
casual(free, simple, natural, chance)
7
makeshift(free, simple, casual, crude)
7
off the cuff(expression, idiom, unprepared, impromptu)
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APASmart Define. (2015). extemporaneous thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/extemporaneous/thesaurus/synonyms
ChicagoSmart Define. 2015. "extemporaneous thesaurus" https://smartdefine.org/extemporaneous/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, extemporaneous thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/extemporaneous/thesaurus/synonyms>.
MLASmart Define. "extemporaneous thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/extemporaneous/thesaurus/synonyms>