115 entries under quick topic. ×

68
watchful(adjective, feature, characteristic, understanding, keen)
45
vigilant(adjective, activity, feature, characteristic, understanding)
35
intelligent(adjective, smart, attentive, sharp, bright)
33
observant(adjective, feature, characteristic, understanding, strong)
29
sharp(adjective, activity, understanding, strong, open)
29
keen(adjective, good, clear, understanding, strong)
28
active(adjective, adverb, activity, good, clear)
24
clever(adjective, sharp, ability, smart, bright)
20
lively(adjective, good, clear, strong, moving)
20
smart(adjective, activity, understanding, sharp, ability)
18
bright(adjective, good, clear, open, moving)
17
brisk(adjective, moving, pleasant, keen, sharp)
17
agile(adjective, keen, sharp, smart, bright)
17
perceptive(adjective, understanding, strong, open, keen)
15
alive(adjective, adverb, open, keen, sharp)
15
fresh(adjective, energetic, person, energy, keen)
15
ready(adjective, activity, open, keen, sharp)
14
quick-witted(adjective, strong, keen, sharp, ability)
13
astute(adjective, understanding, keen, sharp, smart)
12
on the ball(expression, adjective, idiom, adverb, keen)
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APASmart Define. (2016). alert thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/alert/thesaurus/synonyms
ChicagoSmart Define. 2016. "alert thesaurus" https://smartdefine.org/alert/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, alert thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/alert/thesaurus/synonyms>.
MLASmart Define. "alert thesaurus" 26 February 2016. Web. 22 September 2026. <https://smartdefine.org/alert/thesaurus/synonyms>