95 entries under keen topic. ×

5
on to(expression, adjective, idiom, understanding, cool)
5
rational(adjective, understanding, reasonable, sensible)
5
sagacious(adjective, understanding, cool, sound, reasonable)
5
understanding(adjective, sound, sharp, smart)
4
observing(adjective, understanding, kind, sensible)
4
sage(adjective, understanding, cool, sound, reasonable)
3
acute(adjective, understanding, sharp, smart)
3
on the ball(expression, adjective, idiom, careful)
3
on the lookout(expression, adjective, idiom, careful)
2
agog(alert, careful, attentive, watchful)
2
alive to(verb, expression, adjective, phrasal verb, understanding)
2
guarded(adjective, alert, careful, cautious)
2
apperceptive(adjective, understanding, sensible, certain)
2
certain(adjective, understanding, sensible, alert)
2
felt(adjective, understanding, sensible, certain)
2
hep to(expression, adjective, understanding, cool)
2
in on(expression, adjective, understanding, cool)
2
on guard(expression, adjective, alert, careful)
2
on the job(expression, idiom, careful, attentive)
2
quick(adjective, understanding, cool, sharp)
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APASmart Define. (2016). aware thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/aware/thesaurus/synonyms
ChicagoSmart Define. 2016. "aware thesaurus" https://smartdefine.org/aware/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, aware thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/aware/thesaurus/synonyms>.
MLASmart Define. "aware thesaurus" 9 February 2016. Web. 25 September 2026. <https://smartdefine.org/aware/thesaurus/synonyms>