100 entries under observant topic. ×
| sensitive(adjective, understanding, open, keen, sharp) | |
| all ears(expression, adjective, sharp, bright, lively) | |
| hearkening(adjective, attentive) | |
| informed(adjective, understanding, keen, sensible, certain) | |
| percipient(adjective, understanding, keen, sharp, sensible) | |
| sentient(adjective, understanding, open, keen, sensible) | |
| savvy(adjective, understanding, keen, sharp, smart) | |
| unsleeping(adjective, keen, careful, restless, cautious) | |
| with it(expression, adjective, understanding, keen, sharp) | |
| acquainted(adjective, understanding, keen, sensible, certain) | |
| apprised(adjective, understanding, keen, sensible, certain) | |
| au courant(expression, adjective, understanding, keen, sensible) | |
| conversant(adjective, understanding, keen, sensible, certain) | |
| focused(adjective, feature, characteristic, detail, fixed) | |
| on the watch(expression, adjective, idiom, adverb, attention) | |
| on to(expression, adjective, understanding, keen, sensible) | |
| penetrating(adjective, understanding, strong, sharp, smart) | |
| tuned in(expression, understanding, keen, sharp, smart) | |
| understanding(adjective, keen, sharp, smart, bright) | |
| wise to(expression, understanding, keen, sharp, sensible) |
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| APA | Smart Define. (2016). alert thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/alert/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "alert thesaurus" https://smartdefine.org/alert/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, alert thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/alert/thesaurus/synonyms>. |
| MLA | Smart Define. "alert thesaurus" 26 February 2016. Web. 27 September 2026. <https://smartdefine.org/alert/thesaurus/synonyms> |