40 entries under artless topic. ×

26
impromptu(adjective, adverb, simple, plain, informal)
18
offhand(noun, adjective, simple, natural, chance)
15
extempore(adjective, simple, informal, natural, chance)
13
improvised(adjective, simple, informal, natural, chance)
10
ad-lib(adjective, simple, informal, natural, casual)
10
impulsive(noun, adjective, adverb, simple, natural)
9
off-the-cuff(adjective, adverb, simple, informal, natural)
9
unplanned(noun, adjective, simple, informal, natural)
8
unstudied(adjective, simple, natural, casual, impulsive)
7
casual(adjective, free, simple, natural, chance)
4
automatic(adjective, simple, passionate, violent, natural)
4
instinctive(noun, adjective, simple, passionate, violent)
4
uncontrived(adjective, simple, natural, casual, impulsive)
4
unprompted(adjective, simple, plain, violent, natural)
3
involuntary(noun, adjective, simple, passionate, violent)
3
natural(adjective, simple, casual, impulsive, willing)
3
unintentional(adjective, simple, natural, chance, casual)
2
impetuous(noun, adjective, simple, passionate, violent)
2
unconscious(adjective, simple, natural, casual, impulsive)
2
voluntary(adjective, simple, natural, casual, impulsive)
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APASmart Define. (2015). extemporaneous thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/extemporaneous/thesaurus/synonyms
ChicagoSmart Define. 2015. "extemporaneous thesaurus" https://smartdefine.org/extemporaneous/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, extemporaneous thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/extemporaneous/thesaurus/synonyms>.
MLASmart Define. "extemporaneous thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/extemporaneous/thesaurus/synonyms>