Synonyms|648Antonyms|154|Broader|16Narrower|18Related|740
2
open minded
2
percipient(adjective, understanding, cool, keen, sharp)
2
practicing
2
precise(adjective, thoughtful, sober, cautious, prudent)
2
prepared(adjective, alert, careful, cautious, aware)
2
punctual
2
responsive(adjective, understanding, open, kind, keen)
2
sagacious(adjective, understanding, cool, reasonable, keen)
2
sage(adjective, understanding, cool, keen, sharp)
2
sharp-sighted
2
sharp-witted(wise, insightful, sagacious)
2
sleepless(keen, alert, careful, restless, disturbed)
2
smart(adjective, understanding, cool, sharp, bright)
2
strict(adjective, vigilant)
2
submissive(adjective, compliant, dutiful)
2
tuned in(expression, adjective, understanding, cool, keen)
2
with it(expression, adjective, understanding, cool, sharp)
1
bystander
1
defensive(adjective, alert, careful, attentive, protective)
1
guard
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APASmart Define. (2016). observant thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/observant/thesaurus/synonyms
ChicagoSmart Define. 2016. "observant thesaurus" https://smartdefine.org/observant/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, observant thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/observant/thesaurus/synonyms>.
MLASmart Define. "observant thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/observant/thesaurus/synonyms>