206 entries under keen topic. ×

5
sensible(adjective, understanding, open, smart)
5
sensitive(adjective, understanding, open, sharp)
5
speedy(adjective, energetic, active, fast)
5
zippy(adjective, moving, sharp, bright)
4
informed(adjective, understanding, sensible, certain)
4
percipient(adjective, understanding, sharp, sensible)
4
sagacious(adjective, understanding, smart, bright)
4
sage(adjective, understanding, smart, bright)
4
sentient(adjective, understanding, open, sensible)
3
adroit(adjective, good, sharp, smart)
3
dashing(adjective, moving, smart, intense)
3
eager(adjective, strong, intense, energetic)
3
intense(adjective, set, strong, energetic)
3
rapid(adjective, sharp, intense, energetic)
3
savvy(adjective, understanding, sharp, smart)
3
unsleeping(adjective, careful, restless, cautious)
3
with it(expression, adjective, understanding, sharp)
2
acquainted(adjective, understanding, sensible, certain)
2
agog(adjective, strong, intense, enthusiastic)
2
apprised(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>