68 entries under keen topic. ×

47
alert(adjective, feature, characteristic, understanding)
39
vigilant(adjective, feature, characteristic, understanding, cool)
39
careful(adjective, upset, sharp, smart)
36
observant(adjective, feature, characteristic, understanding, cool)
33
cautious(adjective, adverb, smart, sensible)
32
attentive(adjective, feature, characteristic, understanding)
30
wary(adjective, sharp, smart, bright)
20
mindful(adjective, understanding, sensible, certain)
19
guarded(adjective, care, restrained, alert)
18
open-eyed(adjective, feature, characteristic, sharp)
16
wakeful(adjective, sharp, bright, care)
15
aware(adjective, feature, characteristic, understanding, cool)
13
awake(adjective, understanding, cool, reasonable)
9
wide-awake(adjective, sharp, lively, alert)
8
observing(adjective, understanding, sensible, certain)
8
sharp(adjective, understanding, cool, bright)
8
sleepless(adjective, alert, careful, restless)
7
conscious(adjective, understanding, cool, sensible)
7
on the ball(expression, adjective, idiom, sharp)
6
anxious(adjective, upset, excited, ready)
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APASmart Define. (2016). watchful thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/watchful/thesaurus/synonyms
ChicagoSmart Define. 2016. "watchful thesaurus" https://smartdefine.org/watchful/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, watchful thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/watchful/thesaurus/synonyms>.
MLASmart Define. "watchful thesaurus" 26 February 2016. Web. 28 September 2026. <https://smartdefine.org/watchful/thesaurus/synonyms>