Synonyms|185Antonyms|49|Broader|0Narrower|0Related|5

148 entries under adjective topic. ×

14
alert(adverb, keen, sharp, lively)
9
vigilant(adverb, lively, careful, aware)
9
watchful(adverb, sharp, lively, alert)
8
observant(adverb, sharp, lively, alert)
8
wary(adverb, sharp, lively, alert)
7
on guard(expression, adverb, sharp, lively)
6
attentive(keen, sharp, lively, restrained)
6
cautious(adverb, keen, restrained, alert)
4
circumspect(keen, sharp, lively, restrained)
4
heedful(adverb, sharp, lively, alert)
4
mindful(adverb, alert, careful, considerate)
3
all ears(expression, sharp, lively, careful)
3
aware(keen, alert, careful, considerate)
3
eagle-eyed
3
guarded(adverb, keen, alert, careful)
3
on the ball(expression, sharp, lively, alert)
3
on the watch(expression, idiom, adverb, alert)
3
open-eyed(keen, sharp, bright, alert)
3
sharp(keen, bright, lively, alert)
3
wakeful(keen, sharp, 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>