Synonyms|363Antonyms|90|Broader|9Narrower|7Related|1k

63 entries under spontaneous topic. ×

4
informal(adjective, free, casual, impulsive)
4
involuntary(adjective, simple, natural, casual, impulsive)
4
unarranged(adjective, unprepared, unplanned, unrehearsed)
4
uncontrived(adjective, simple, natural, casual, impulsive)
4
uncontrolled(adjective, simple, natural, casual, impulsive)
4
unexpected(adjective, chance, unqualified, vulnerable)
2
free(adjective, simple, fake, natural, casual)
2
from the hip(expression, adjective, idiom, simple, natural)
2
improvisatory(free, casual, impulsive, unprepared)
2
made-up(adjective, adverb, free, impulsive)
2
natural(adjective, simple, casual, impulsive, willing)
2
unscripted(adjective, adverb, mock, affected)
1
autoschediastic(free, casual, impulsive, unprepared)
1
break loose(expression, adjective, simple, natural, casual)
1
down(adjective, simple, natural, casual, impulsive)
1
expedient(free, casual, impulsive, unprepared)
1
free spirited(expression, adjective, simple, natural, casual)
1
impetuous(adjective, simple, natural, casual, quick)
1
inevitable(adjective, simple, natural, casual, impulsive)
1
irresistible(adjective, simple, natural, casual, impulsive)
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APASmart Define. (2016). impromptu thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/impromptu/thesaurus/synonyms
ChicagoSmart Define. 2016. "impromptu thesaurus" https://smartdefine.org/impromptu/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, impromptu thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/impromptu/thesaurus/synonyms>.
MLASmart Define. "impromptu thesaurus" 28 January 2016. Web. 26 September 2026. <https://smartdefine.org/impromptu/thesaurus/synonyms>