Synonyms|648Antonyms|154|Broader|16Narrower|18Related|740
1
lazy
1
mindless
1
remiss
1
undiscerning(adjective, interested)
1
unfocused
1
unguarded
1
unheeding
1
unknowing
1
unlawful
1
unperceiving
1
unprepared
1
unthinking
1
unwatchful(adjective, careless, concerned, unobservant)
0
absent-minded
0
absorbed
0
accidental
0
apathetic
0
arbitrary
0
asleep
0
blind drunk
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APASmart Define. (2016). observant thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/observant/thesaurus/antonyms
ChicagoSmart Define. 2016. "observant thesaurus" https://smartdefine.org/observant/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2016, observant thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/observant/thesaurus/antonyms>.
MLASmart Define. "observant thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/observant/thesaurus/antonyms>