100 entries under observant topic. ×
| cognizant(adjective, understanding, keen, sensible, certain) | |
| aesthetic(adjective, understanding, keen, sensible, certain) | |
| alive to(verb, expression, adjective, phrasal verb, understanding) | |
| apperceptive(adjective, understanding, keen, sensible, certain) | |
| assured(adjective, understanding, keen, sensible, certain) | |
| certain(adjective, understanding, keen, sensible, sure) | |
| felt(adjective, understanding, keen, sensible, certain) | |
| glued(adjective, careful, caring, thoughtful, considerate) | |
| hep to(expression, adjective, understanding, keen, sensible) | |
| hooked(adjective, careful, caring, thoughtful, considerate) | |
| in on(expression, adjective, understanding, keen, sensible) | |
| in right mind(expression, adjective, idiom, understanding, keen) | |
| incisive(adjective, understanding, strong, keen, sharp) | |
| known(adjective, understanding, keen, sensible, certain) | |
| listening carefully(expression, adjective, attentive) | |
| not missing a trick(expression, adjective, idiom, careful, cautious) | |
| noticing(adjective, understanding, keen, sensible, certain) | |
| noting(adjective, understanding, keen, sensible, certain) | |
| on the qui vive(expression, adjective, idiom, keen, lively) | |
| paying attention(expression, adverb, sharp, attentive, alive) |
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| APA | Smart Define. (2016). alert thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/alert/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "alert thesaurus" https://smartdefine.org/alert/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, alert thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/alert/thesaurus/synonyms>. |
| MLA | Smart Define. "alert thesaurus" 26 February 2016. Web. 26 September 2026. <https://smartdefine.org/alert/thesaurus/synonyms> |