31 entries under impromptu topic. ×

12
involuntary(adjective, simple, natural, casual, thoughtless)
8
voluntary(adjective, simple, natural, casual, impulsive)
6
extemporaneous(adjective, simple, plain, violent, natural)
5
automatic(adjective, simple, violent, natural, casual)
4
unbidden(adjective, simple, natural, casual, impulsive)
4
unconscious(adjective, simple, natural, casual, impulsive)
4
unplanned(adjective, simple, natural, casual, impulsive)
3
impetuous(adjective, simple, passionate, violent, natural)
2
free(adjective, simple, natural, casual, impulsive)
2
improvised(adjective, simple, natural, casual, impulsive)
2
uncompelled(adjective, simple, natural, casual, impulsive)
2
unintentional(adjective, simple, natural, casual, impulsive)
1
ad-lib(adjective, adverb, simple, violent, natural)
1
break loose(expression, adjective, simple, natural, casual)
1
casual(adjective, simple, natural, impulsive, willing)
1
down(adjective, simple, natural, casual, impulsive)
1
extempore(adjective, simple, natural, casual, impulsive)
1
free spirited(expression, adjective, simple, natural, casual)
1
from the hip(expression, adjective, idiom, simple, natural)
1
inevitable(adjective, simple, natural, casual, impulsive)
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APASmart Define. (2015). unprompted thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unprompted/thesaurus/synonyms
ChicagoSmart Define. 2015. "unprompted thesaurus" https://smartdefine.org/unprompted/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unprompted thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unprompted/thesaurus/synonyms>.
MLASmart Define. "unprompted thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/unprompted/thesaurus/synonyms>