65 entries under spontaneous topic. ×

2
band-aid(adjective, crude, substitute, temporary)
2
free(adjective, simple, fake, natural, casual)
2
improviso(adjective, free, unprepared, impromptu)
2
unarranged(adjective, unprepared, unplanned, unrehearsed)
2
uncontrived(adjective, simple, natural, casual, impulsive)
1
autoschediastic(adjective, free, casual, impulsive)
1
break loose(expression, adjective, simple, natural, casual)
1
down(adjective, simple, natural, casual, impulsive)
1
expedient(adjective, free, casual, crude, impulsive)
1
fake(free, casual, impulsive, untrue)
1
free spirited(expression, adjective, simple, natural, casual)
1
from the hip(expression, adjective, idiom, simple, natural)
1
immediate(free, casual, impulsive, unprepared)
1
impetuous(adjective, simple, natural, casual, impulsive)
1
improv(adverb, free, casual, unprepared)
1
inevitable(adjective, simple, natural, casual, impulsive)
1
informal(adjective, free, casual, impulsive)
1
instinctive(adjective, simple, natural, casual, impulsive)
1
involuntary(adjective, simple, natural, casual, impulsive)
1
irresistible(adjective, simple, natural, casual, impulsive)
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APASmart Define. (2015). improvised thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/improvised/thesaurus/synonyms
ChicagoSmart Define. 2015. "improvised thesaurus" https://smartdefine.org/improvised/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, improvised thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/improvised/thesaurus/synonyms>.
MLASmart Define. "improvised thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/improvised/thesaurus/synonyms>