98 entries under adjective topic. ×

24
impromptu(adverb, free, simple, fake)
20
offhand(adverb, free, simple, fake)
16
extemporaneous(simple, informal, natural, chance)
13
extemporary(free, casual, impulsive, prepared)
13
unpremeditated(free, planned, spontaneous, impromptu)
12
unprepared(free, spontaneous, impromptu, unplanned)
11
spontaneous(free, simple, fake, informal)
11
unrehearsed(free, prepared, spontaneous, impromptu)
10
ad lib(expression, idiom, adverb, free)
9
ad-lib(adverb, free, simple, fake)
9
improvised(free, simple, fake, informal)
9
off-the-cuff(simple, informal, natural, straightforward)
9
unstudied(free, simple, fake, natural)
8
off the cuff(expression, idiom, adverb, free)
7
casual(free, simple, fake, natural)
7
offhanded
7
spur-of-the-moment(free, prepared, spontaneous, impromptu)
7
unplanned(free, simple, fake, informal)
5
informal(free, simple, casual, spontaneous)
4
makeshift(free, informal, casual, impulsive)
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APASmart Define. (2015). extempore thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/extempore/thesaurus/synonyms
ChicagoSmart Define. 2015. "extempore thesaurus" https://smartdefine.org/extempore/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, extempore thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/extempore/thesaurus/synonyms>.
MLASmart Define. "extempore thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/extempore/thesaurus/synonyms>