206 entries under keen topic. ×

15
open-eyed(adjective, feature, characteristic, sharp)
15
ready(adjective, activity, open, sharp)
14
quick-witted(adjective, strong, sharp, ability)
13
astute(adjective, understanding, sharp, smart)
13
wakeful(adjective, sharp, care, careful)
12
on the ball(expression, adjective, idiom, adverb)
12
animated(adjective, strong, moving, smart)
12
on guard(expression, adjective, idiom, adverb)
12
spry(adjective, activity, good, clear, moving)
12
wise(verb, adjective, understanding, sharp)
11
nimble(adjective, sharp, smart, bright)
11
spirited(adjective, strong, moving, sharp)
11
swift(adjective, activity, sharp, energetic)
10
acute(adjective, understanding, strong, sharp)
10
guarded(adjective, adverb, care, sensible)
10
vigorous(adjective, good, clear, moving, pleasant)
10
vivacious(adjective, strong, sharp, smart)
10
wide-awake(adjective, adverb, sharp, smart)
9
conscious(adjective, understanding, open, sharp)
9
observing(adjective, understanding, sensible, certain)
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APASmart Define. (2016). alert thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/alert/thesaurus/synonyms
ChicagoSmart Define. 2016. "alert thesaurus" https://smartdefine.org/alert/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, alert thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/alert/thesaurus/synonyms>.
MLASmart Define. "alert thesaurus" 26 February 2016. Web. 27 September 2026. <https://smartdefine.org/alert/thesaurus/synonyms>