Synonyms|648Antonyms|154|Broader|16Narrower|18Related|740

314 entries under adjective topic. ×

2
fastidious(thoughtful, sober, cautious, prudent)
2
feeling
2
focused(feature, characteristic, detail, attentive)
2
hearkening
2
helpful(kind, friendly, alert, careful)
2
immersed(considerate, responsive, aware, attentive)
2
intense(strong, sharp, powerful, deep)
2
leery(thoughtful, sober, cautious, prudent)
2
not missing a trick(expression, idiom, sympathetic, alert)
2
on one's toes(alert, watchful)
2
on the alert(expression, idiom, alert, careful)
2
on the qui vive(expression, idiom, keen, sharp)
2
percipient(understanding, cool, keen, sharp)
2
precise(thoughtful, sober, cautious, prudent)
2
prepared(alert, careful, cautious, aware)
2
responsive(understanding, open, kind, keen)
2
sagacious(understanding, cool, reasonable, keen)
2
sage(understanding, cool, keen, sharp)
2
sharp-sighted
2
smart(understanding, cool, sharp, bright)
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APASmart Define. (2016). observant thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/observant/thesaurus/synonyms
ChicagoSmart Define. 2016. "observant thesaurus" https://smartdefine.org/observant/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, observant thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/observant/thesaurus/synonyms>.
MLASmart Define. "observant thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/observant/thesaurus/synonyms>