5
idiotic(adjective, dull, simple, slow, silly)
5
impolite(adjective, careless, thoughtless, unkind, insensitive)
5
insane(adjective, foolish, unreasonable, illogical)
5
lumpish
5
nonsensical(adjective, dull, foolish, stupid, unreasonable)
5
perfunctory(adjective, cold, indifferent, useful, casual)
5
thoughtlessly
5
undesigned(adjective, unknowing, necessity, unaware, unplanned)
5
unintelligent(adjective, dull, simple, slight, silly)
5
unintended(adjective, careless, thoughtless, inconsiderate, unwilling)
5
unperceiving(adjective, careless, indifferent, apathetic, distracted)
5
unperceptive(adjective, sharp, rough, careless, casual)
5
unplanned(adjective, impulsive, rash, unknowing, unaware)
5
unreflecting(adjective, violent, fierce, ardent, impulsive)
5
visceral(adjective, natural, emotional, instinctive, automatic)
5
witless(adjective, dull, simple, slow, careless)
5
worry-free
4
absent-minded(adjective, careless, indifferent, foolish, stupid)
4
basic(adjective, gut, intuitive)
4
bold(adjective, careless, thoughtless, impulsive, rash)
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APASmart Define. (2015). unthinking thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unthinking/thesaurus/synonyms
ChicagoSmart Define. 2015. "unthinking thesaurus" https://smartdefine.org/unthinking/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unthinking thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unthinking/thesaurus/synonyms>.
MLASmart Define. "unthinking thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/unthinking/thesaurus/synonyms>