120 entries under keen topic. ×

3
aesthetic(adjective, understanding, certain, alert)
3
alive to(verb, expression, adjective, phrasal verb, understanding)
3
apprised(adjective, understanding, certain, alert)
3
oversensitive(adjective, understanding, fine, delicate)
3
psychic(adjective, understanding, fine, delicate)
3
quick(adjective, good, understanding, cool)
3
receptive(adjective, visual, understanding, open, sound)
3
sensile(adjective, understanding, open, easy)
3
vigilant(adjective, understanding, cool, reasonable)
3
watchful(adjective, understanding, cool, reasonable)
3
wise to(expression, understanding, certain, alert)
3
witting(adjective, understanding, cool, reasonable)
2
acquainted(adjective, understanding, certain, alert)
2
apperceptive(adjective, understanding, certain, alert)
2
assured(adjective, understanding, certain, alert)
2
brilliant(adjective, good, cool, sharp)
2
cagey(adjective, smooth, reasonable, sharp)
2
certain(adjective, understanding, reasonable, firm)
2
competent(adjective, good, cool, sharp)
2
crafty(adjective, smooth, sharp, smart)
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APASmart Define. (2016). sensible thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/sensible/thesaurus/synonyms
ChicagoSmart Define. 2016. "sensible thesaurus" https://smartdefine.org/sensible/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, sensible thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/sensible/thesaurus/synonyms>.
MLASmart Define. "sensible thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/sensible/thesaurus/synonyms>