Synonyms|477Antonyms|26|Broader|4Narrower|0Related|17

59 entries under keen topic. ×

3
on guard(expression, adjective, sharp, bright)
3
savvy(adjective, smooth, sharp, smart)
3
wakeful(adjective, sharp, bright, alert)
3
wary(adjective, sharp, bright, lively)
2
acute(adjective, smooth, sharp, smart)
2
brainy(adjective, smooth, sharp, smart)
2
cagey(adjective, smooth, sharp, smart)
2
circumspect(adjective, sharp, bright, lively)
2
knowing(adjective, smooth, sharp, smart)
2
on the qui vive(expression, idiom, sharp, bright)
2
sharp-witted(adjective, sharp, smart, bright)
2
sleepless(alert, careful, attentive, watchful)
2
slick(adjective, smooth, sharp, smart)
2
unsleeping(adjective, alert, careful, cautious)
1
canny(adjective, smooth, sharp, smart)
1
cautious(adjective, alert, careful, aware)
1
crafty(adjective, good, smooth, sharp)
1
cunning(adjective, smooth, sharp, smart)
1
discerning(adjective, smooth, sharp, smart)
1
foxy(adjective, smooth, sharp, smart)
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APASmart Define. (2015). on the ball thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/on_the_ball/thesaurus/synonyms
ChicagoSmart Define. 2015. "on the ball thesaurus" https://smartdefine.org/on_the_ball/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, on the ball thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/on_the_ball/thesaurus/synonyms>.
MLASmart Define. "on the ball thesaurus" 14 April 2015. Web. 1 October 2026. <https://smartdefine.org/on_the_ball/thesaurus/synonyms>