132 entries under alert topic. ×

1
prophylactic(adjective, careful, attentive, protective)
1
psyched up(expression, sharp, bright, lively)
1
savvy(adjective, understanding, cool, keen, sharp)
1
see after(expression, adjective, careful, cautious)
1
see to(expression, adjective, careful, cautious)
1
sophic(adjective, understanding, cool, keen, sharp)
1
spirited(adjective, strong, sharp, bright, intense)
1
suspicious(adjective, careful, cautious, attentive)
1
unsleeping(adjective, keen, careful, cautious)
1
wired(sharp, bright, lively, attentive)
1
wise to(expression, adjective, understanding, cool, keen)
1
with eyes peeled(expression, adjective, idiom, keen)
1
with weather eye open(expression, keen, careful, attentive)
0
clued-in
0
clued up(expression, aware, clued-in)
0
feeling wary(expression, careful)
0
gnostic(understanding, keen, sensitive, perceptive)
0
insighted(understanding, keen, sensitive, perceptive)
0
inspecting
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looking(adjective, observing)
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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>