38 entries under improvised topic. ×

5
makeshift(adjective, free, casual, limited, brief)
4
impromptu(adjective, free, informal, casual, unplanned)
4
offhand(adjective, free, informal, casual, impulsive)
2
ad lib(expression, adjective, free, informal, casual)
2
immediate(adjective, present, free, fake, informal)
2
spontaneous(adjective, free, informal, casual, unplanned)
2
spur-of-the-moment(adjective, free, fake, informal, casual)
2
unplanned(adjective, free, informal, casual, impulsive)
2
unpremeditated(adjective, free, informal, casual, snap)
2
unprepared(adjective, free, fake, informal, casual)
1
casual(adjective, free, fake, informal, impulsive)
1
ad-lib(adjective, free, fake, informal, casual)
1
at first glance(expression, free, informal, casual, snap)
1
automatic(free, informal, casual, impulsive, unprepared)
1
by ear(expression, free, informal, casual, unrehearsed)
1
expedient(adjective, free, appropriate, useful, casual)
1
extemporaneous(adjective, free, informal, casual, impulsive)
1
extemporary(free, casual, impulsive, spontaneous, unprepared)
1
extempore(free, informal, casual, impulsive, unplanned)
1
free(informal, casual, impulsive, spontaneous, unprepared)
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APASmart Define. (2016). ad hoc thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/ad_hoc/thesaurus/synonyms
ChicagoSmart Define. 2016. "ad hoc thesaurus" https://smartdefine.org/ad_hoc/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, ad hoc thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/ad_hoc/thesaurus/synonyms>.
MLASmart Define. "ad hoc thesaurus" 26 February 2016. Web. 28 September 2026. <https://smartdefine.org/ad_hoc/thesaurus/synonyms>