55 entries under impromptu topic. ×

8
extempore(adjective, adverb, free, casual, spontaneous)
7
extemporaneous(adjective, adverb, impulsive, spontaneous, unprepared)
7
unprepared(adjective, free, informal, casual, snap)
4
extemporary(adjective, free, casual, spontaneous, unprepared)
3
by ear(expression, adjective, free, informal, casual)
3
extemporaneously(adverb, spontaneously, improv)
3
improviso(adjective, free, informal, mock, casual)
3
spontaneously(adverb, improv, extemporaneously)
3
spur-of-the-moment(adjective, free, informal, casual, snap)
2
ad hoc(expression, adjective, free, informal, casual)
2
fake(verb, adjective, spontaneous, unprepared)
2
improv(verb, adjective, adverb, free, informal)
2
toss off(verb, expression, adjective, spontaneous, unprepared)
2
toss out(expression, adjective, spontaneous, unprepared)
2
tossed off(expression, adjective, free, create, informal)
1
cooked-up(mock, affected)
1
improvisatory(adjective, free, informal, casual, snap)
1
on-the-spot(adjective, free, informal, casual, snap)
1
on impulse(expression, adjective, free, informal, casual)
1
spur of the moment(expression, adjective, idiom, adverb, mock)
<123>
11 years ago|3k views|share |citing 
APASmart Define. (2015). ad lib thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/ad_lib/thesaurus/synonyms
ChicagoSmart Define. 2015. "ad lib thesaurus" https://smartdefine.org/ad_lib/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, ad lib thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/ad_lib/thesaurus/synonyms>.
MLASmart Define. "ad lib thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/ad_lib/thesaurus/synonyms>