Synonyms|96Antonyms|3|Broader|0Narrower|0Related|4

30 entries under spontaneous topic. ×

4
impromptu(adjective, adverb, free, unprepared)
3
ad lib(expression, adjective, free, informal, mock)
3
extemporaneous(adjective, free, casual, unprepared)
3
offhand(adjective, free, informal, casual)
2
by ear(expression, adjective, free, fake, informal)
2
extempore(adjective, free, casual, impulsive)
2
improv(adjective, free, fake, informal, mock)
2
improvisatory(adjective, free, fake, informal, casual)
2
improvised(adjective, free, unprepared, impromptu)
2
makeshift(adjective, free, informal, casual)
2
on-the-spot(adjective, free, fake, informal, casual)
2
on impulse(expression, adjective, free, fake, informal)
2
spur-of-the-moment(adjective, free, unprepared, unplanned)
2
tossed off(expression, adjective, free, informal, mock)
2
unpremeditated(adjective, free, casual, unprepared)
2
unprepared(adjective, free, impromptu, unplanned)
2
unstudied(adjective, free, informal, casual)
1
ad-lib(adjective, unprepared, impromptu, unplanned)
1
autoschediastic(adjective, free, casual, impulsive)
1
extemporary(adjective, free, fake, casual, impulsive)
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APASmart Define. (2015). improviso thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/improviso/thesaurus/synonyms
ChicagoSmart Define. 2015. "improviso thesaurus" https://smartdefine.org/improviso/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, improviso thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/improviso/thesaurus/synonyms>.
MLASmart Define. "improviso thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/improviso/thesaurus/synonyms>