93 entries under adjective topic. ×

18
spontaneous(free, impulsive, willing, impulse)
18
extemporaneous(simple, informal, natural, chance)
16
unrehearsed(adverb, free, impulsive, prepared)
15
makeshift(adverb, free, offhand, unprepared)
12
impromptu(free, simple, fake, informal)
9
jury-rigged(offhand, makeshift)
8
extempore(free, simple, fake, informal)
8
offhand(free, simple, fake, natural)
8
unprepared(free, ready, spontaneous, unprepared)
7
ad-lib(adverb, free, simple, fake)
7
extemporary(free, casual, impulsive, prepared)
7
temporary
6
ad lib(expression, idiom, adverb, free)
6
off-the-cuff(adverb, simple, informal, natural)
6
unplanned(free, simple, fake, informal)
6
unpremeditated(free, casual, impulsive, impulse)
5
casual(free, simple, fake, natural)
5
extemporized(informal, spontaneous, unplanned, unrehearsed)
5
fictitious(untrue, developed, invented, fabricated)
5
snap(free, casual, impulsive, impulse)
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APASmart Define. (2015). improvised thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/improvised/thesaurus/synonyms
ChicagoSmart Define. 2015. "improvised thesaurus" https://smartdefine.org/improvised/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, improvised thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/improvised/thesaurus/synonyms>.
MLASmart Define. "improvised thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/improvised/thesaurus/synonyms>