45 entries under obtuse topic. ×

9
unreasonable(adjective, careless, stupid, unthinking, impetuous)
8
irrational(adjective, careless, stupid, unthinking, impetuous)
8
rash(adjective, impetuous, unperceptive, unobservant)
6
mindless(adjective, careless, stupid, unthinking, inattention)
6
unperceptive(adjective, casual, blind, unfussy)
6
unthinking(adjective, careless, indifferent, foolish, stupid)
5
heedless(adjective, careless, indifferent, apathetic, unconcerned)
5
senseless(adjective, careless, stupid, unthinking)
4
careless(adjective, indifferent, foolish, stupid, casual)
4
injudicious(adjective, dull, careless, indifferent, foolish)
4
insensitive(adjective, dull, careless, indifferent, thoughtless)
4
witless(adjective, careless, stupid, unthinking)
3
foolish(adjective, careless, stupid, unthinking)
3
inattentive(adjective, careless, indifferent, attention, unconcerned)
3
silly(adjective, careless, stupid, unthinking)
3
stupid(adjective, careless, unthinking, unperceptive)
3
unheeding(verb, adjective, careless, indifferent, apathetic)
3
unmindful(adjective, careless, indifferent, apathetic, unconcerned)
3
unreflective(adjective, careless, stupid, unthinking, inattention)
2
bovine(adjective, careless, stupid, unthinking)
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APASmart Define. (2015). undiscerning thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/undiscerning/thesaurus/synonyms
ChicagoSmart Define. 2015. "undiscerning thesaurus" https://smartdefine.org/undiscerning/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, undiscerning thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/undiscerning/thesaurus/synonyms>.
MLASmart Define. "undiscerning thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/undiscerning/thesaurus/synonyms>