13
natural(adjective, instinctive, gut, automatic, intuitive)
13
reflex(adjective, natural, impulsive, unconscious, forced)
13
unpremeditated(adjective, careless, casual, impulsive, instinctive)
12
inadvertent(adjective, careless, indifferent, foolish, stupid)
12
incautious(adjective, careless, foolish, careful, casual)
12
negligent(adjective, sharp, rude, careless, indifferent)
11
blind(adjective, sharp, rude, careless, indifferent)
11
foolish(adjective, dull, simple, wrong, slight)
11
indiscreet(adjective, dull, sharp, rough, rude)
11
innate(adjective, natural, instinctive, gut, automatic)
11
unheeding(adjective, sharp, rude, careless, indifferent)
11
unreflective(adjective, careless, stupid, casual, inattention)
11
unwitting(adjective, unknowing, necessity, unaware, unwilling)
11
vacant(adjective, careless, indifferent, blank, thoughtless)
10
irrational(adjective, careless, foolish, stupid, unreasonable)
10
neglectful(adjective, sharp, rude, careless, indifferent)
10
senseless(adjective, dull, simple, wrong, slow)
9
fatuous(adjective, thoughtless)
9
stupid(adjective, dull, careless, indifferent, foolish)
9
unintentional(adjective, planned, unconscious, necessity, unwilling)
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APASmart Define. (2015). unthinking thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unthinking/thesaurus/synonyms
ChicagoSmart Define. 2015. "unthinking thesaurus" https://smartdefine.org/unthinking/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, unthinking thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unthinking/thesaurus/synonyms>.
MLASmart Define. "unthinking thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/unthinking/thesaurus/synonyms>