Synonyms|77Antonyms|4|Broader|1Narrower|0Related|11
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anxious(alert, attentive, watchful)
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aroused
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astir
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aware(alert, attentive, wary, watchful)
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conscious
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eagle-eyed
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eventful
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glued(alert, attentive, observant)
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hawk-eyed
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hooked(alert, attentive, observant)
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looking for(expression, alert, attentive, watchful)
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looking to(expression, alert, attentive, watchful)
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lookout
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not missing a trick(expression, idiom, alert, attentive, observant)
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on alert(expression, alert, attentive, watchful)
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on one's guard
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on one's toes
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on toes(expression, alert, attentive, watchful)
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on your guard(expression, adjective, alert, aware, attentive)
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open-eyed(alert, attentive, watchful, observant)
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APASmart Define. (2015). on the alert thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/on_the_alert/thesaurus/synonyms
ChicagoSmart Define. 2015. "on the alert thesaurus" https://smartdefine.org/on_the_alert/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, on the alert thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/on_the_alert/thesaurus/synonyms>.
MLASmart Define. "on the alert thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/on_the_alert/thesaurus/synonyms>