Synonyms|648Antonyms|154|Broader|16Narrower|18Related|740
10
unaware(adjective, careless, unobservant)
7
half ass
6
careless(adjective, unobservant)
5
absentminded(adjective, inattentive)
5
contemptuous
5
inattentive(adjective, careless, attention, concerned, negligent)
4
oblivious
4
thoughtless(adjective, reasonable, careless, prudent, unobservant)
4
unmindful(adjective, careless, unobservant)
3
heedless(adjective, careless, careful, unobservant)
3
indifferent(adjective, careless, unobservant)
3
neglectful(adjective, careless, unobservant)
3
negligent(adjective, careless, unobservant)
3
unobservant(adjective, careless, observant)
2
abstracted
2
blind
2
bohemian
2
incautious
2
lax
2
out of control
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APASmart Define. (2016). observant thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/observant/thesaurus/antonyms
ChicagoSmart Define. 2016. "observant thesaurus" https://smartdefine.org/observant/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, observant thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/observant/thesaurus/antonyms>.
MLASmart Define. "observant thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/observant/thesaurus/antonyms>