44 entries under attentive topic. ×

14
alert(adjective, adverb, keen, sharp, lively)
9
vigilant(adjective, adverb, lively, careful, aware)
9
watchful(adjective, adverb, sharp, lively, alert)
8
observant(adjective, adverb, sharp, lively, alert)
8
wary(adjective, adverb, sharp, lively, alert)
7
on guard(expression, adjective, adverb, sharp, lively)
4
circumspect(adjective, keen, sharp, lively, restrained)
4
heedful(adjective, adverb, sharp, lively, alert)
3
all ears(expression, adjective, sharp, lively, careful)
3
on the ball(expression, adjective, sharp, lively, alert)
3
sharp(adjective, keen, bright, lively, alert)
2
cagey(adjective, sharp, lively, restrained, careful)
2
careful(adjective, adverb, keen, sharp, lively)
2
on the alert(adjective, alert, careful, disturbed, aware)
2
on the job(expression, adjective, idiom, sharp, lively)
2
on the qui vive(expression, adjective, idiom, sharp, lively)
2
wide-awake(adjective, keen, sharp, lively, alert)
1
active(adjective, sharp, bright, lively, alert)
1
acute(adjective, keen, anxious, alert, careful)
1
agog(adjective, keen, anxious, alert, careful)
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APASmart Define. (2015). on the lookout thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/on_the_lookout/thesaurus/synonyms
ChicagoSmart Define. 2015. "on the lookout thesaurus" https://smartdefine.org/on_the_lookout/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, on the lookout thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/on_the_lookout/thesaurus/synonyms>.
MLASmart Define. "on the lookout thesaurus" 14 April 2015. Web. 1 October 2026. <https://smartdefine.org/on_the_lookout/thesaurus/synonyms>