46 entries under obtuse topic. ×

20
inattentive(noun, adjective, careless, cold, indifferent)
17
heedless(noun, adjective, careless, cold, indifferent)
15
careless(noun, adjective, cold, indifferent, foolish)
14
unmindful(noun, adjective, careless, cold, indifferent)
11
negligent(noun, adjective, careless, cold, casual)
11
unheeding(verb, adjective, careless, cold, careful)
10
neglectful(noun, adjective, careless, cold, indifferent)
10
regardless(adjective, adverb, careless, cold, foolish)
9
absent-minded(noun, adjective, careless, cold, foolish)
9
inadvertent(adjective, careless, cold, foolish, stupid)
6
remiss(noun, adjective, careless, cold, foolish)
5
unthinking(adjective, careless, indifferent, foolish, stupid)
4
mindless(adjective, careless, stupid, careful, casual)
4
undiscerning(adjective, careless, indifferent, foolish, stupid)
3
unperceptive(adjective, inattentive, blind)
2
reckless(adjective, casual, rash, happy-go-lucky)
1
imprudent(careless, stupid, casual, rash, unthinking)
1
injudicious(adjective, careless, indifferent, foolish, stupid)
1
insensitive(adjective, dull, careless, indifferent, thoughtless)
1
irreflective(careless, stupid, rash, unthinking)
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APASmart Define. (2015). unobservant thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unobservant/thesaurus/synonyms
ChicagoSmart Define. 2015. "unobservant thesaurus" https://smartdefine.org/unobservant/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unobservant thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unobservant/thesaurus/synonyms>.
MLASmart Define. "unobservant thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/unobservant/thesaurus/synonyms>