102 entries under simple topic. ×

4
impromptu(adjective, adverb, natural, chance)
4
improvised(adjective, adverb, natural, chance)
3
unaffected(adjective, open, easy, plain)
3
uncontrived(adjective, open, easy, natural)
3
unfeigned(adjective, open, smooth, easy)
3
unforced(adjective, open, easy, natural)
3
unstudied(adjective, open, easy, natural)
2
ad lib(expression, adjective, idiom, adverb)
2
candid(easy, plain, innocent, real)
2
credulous(adjective, open, easy, innocent)
2
easy(real, genuine, unaffected, unpretentious)
2
frank(easy, innocent, real, genuine)
2
jejune(plain, fresh, innocent, sincere)
2
unsophisticated(adjective, open, easy, natural)
2
voluntary(adjective, natural, casual, willing)
1
aboveboard(plain, fresh, innocent, sincere)
1
ad-lib(adjective, adverb, natural, casual)
1
being oneself(expression, adjective, open, easy)
1
break loose(expression, adjective, natural, casual)
1
callow(plain, fresh, innocent, sincere)
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APASmart Define. (2015). impulsive thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impulsive/thesaurus/synonyms
ChicagoSmart Define. 2015. "impulsive thesaurus" https://smartdefine.org/impulsive/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, impulsive thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impulsive/thesaurus/synonyms>.
MLASmart Define. "impulsive thesaurus" 3 August 2015. Web. 23 September 2026. <https://smartdefine.org/impulsive/thesaurus/synonyms>