38 entries under improvised topic. ×

19
unplanned(noun, adjective, free, chance, casual)
17
extemporaneous(noun, adjective, impulsive, planned, impulse)
15
impromptu(adjective, adverb, free, impulsive, planned)
13
casual(adjective, free, careless, chance, random)
13
offhand(noun, adjective, free, careless, casual)
11
extempore(adjective, free, planned, spontaneous, impromptu)
10
automatic(adjective, free, casual, planned, spontaneous)
10
unprepared(adjective, free, spontaneous, impromptu, unplanned)
10
unstudied(adjective, free, casual, spontaneous, impromptu)
9
spur-of-the-moment(noun, adjective, free, impulsive, spontaneous)
8
ad lib(expression, adjective, idiom, free, casual)
8
off the cuff(expression, adjective, idiom, free, impromptu)
6
snap(noun, adjective, free, informal, casual)
5
extemporary(adjective, free, casual, impulsive, spontaneous)
5
unrehearsed(adjective, free, impulsive, spontaneous, unprepared)
4
ad-lib(adjective, spontaneous, unprepared, impromptu, unplanned)
4
makeshift(adjective, free, informal, casual, snap)
2
ad hoc(expression, adjective, free, casual, unrehearsed)
2
improv(free, informal, casual, spontaneous, unprepared)
2
improvisatory(free, informal, casual, impulsive, impulse)
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APASmart Define. (2015). unpremeditated thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unpremeditated/thesaurus/synonyms
ChicagoSmart Define. 2015. "unpremeditated thesaurus" https://smartdefine.org/unpremeditated/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unpremeditated thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unpremeditated/thesaurus/synonyms>.
MLASmart Define. "unpremeditated thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/unpremeditated/thesaurus/synonyms>