17 entries under expression topic. ×

4
on the job(adjective, idiom, alert, attentive)
2
on guard(adjective, alert, careful, restless)
2
on the ball(idiom, alert, aware, attentive)
1
on the qui vive(idiom, alert, careful, disturbed)
1
on the watch(idiom, alert, attentive, observant)
0
all ears(alert, attentive, observant)
0
looking for(alert, attentive, watchful)
0
looking to(alert, attentive, watchful)
0
not missing a trick(idiom, alert, attentive, observant)
0
on alert(alert, attentive, watchful)
0
on toes(alert, attentive, watchful)
0
on your guard(adjective, alert, aware, attentive)
0
see after(alert, attentive, observant)
0
see to(alert, attentive, observant)
0
waiting on(alert, attentive, watchful)
0
with eyes peeled(idiom, alert, attentive, watchful)
0
with weather eye open(idiom, alert, attentive, watchful)
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APASmart Define. (2015). on the alert thesaurus. Retrieved September 20, 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 20, 2026).
HarvardSmart Define 2015, on the alert thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/on_the_alert/thesaurus/synonyms>.
MLASmart Define. "on the alert thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/on_the_alert/thesaurus/synonyms>