104 entries under careful topic. ×

12
on the ball(expression, adjective, idiom, adverb, keen)
12
on guard(expression, adjective, idiom, adverb, keen)
12
wise(verb, adjective, understanding, keen, sharp)
11
overprotective(adjective, attentive, protective)
10
acute(adjective, understanding, strong, keen, sharp)
10
guarded(adjective, adverb, keen, care, sensible)
10
wide-awake(adjective, adverb, keen, sharp, smart)
9
conscious(adjective, understanding, open, keen, sharp)
9
observing(adjective, understanding, keen, sensible, certain)
8
discerning(adjective, understanding, keen, sharp, smart)
8
meticulous(adjective, thoughtful, sober, attentive)
7
concerned(adjective, thoughtful, sober, attentive)
7
thoughtful(adjective, care, sober, cautious)
6
discreet(adjective, sensible, thoughtful, cautious)
6
knowing(adjective, understanding, keen, sharp, smart)
6
provident(adjective, care, thoughtful, sober)
6
scrupulous(adjective, thoughtful, sober, attentive)
6
shrewd(adjective, understanding, sharp, bright)
6
sleepless(adjective, keen, restless, disturbed)
5
chary(adjective, reasonable, sensible, deliberate, restrained)
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APASmart Define. (2016). alert thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/alert/thesaurus/synonyms
ChicagoSmart Define. 2016. "alert thesaurus" https://smartdefine.org/alert/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, alert thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/alert/thesaurus/synonyms>.
MLASmart Define. "alert thesaurus" 26 February 2016. Web. 28 September 2026. <https://smartdefine.org/alert/thesaurus/synonyms>