Synonyms|1.4kAntonyms|370|Broader|31Narrower|60Related|1.3k

113 entries under idiom topic. ×

14
on the lookout(expression, adjective, care, lively)
12
on the ball(expression, adjective, adverb, keen)
12
on guard(expression, adjective, adverb, keen)
10
wide awake(expression, adjective, sharp, bright)
7
qui vive(noun, expression)
5
on the alert(expression, activity, care, disturbed)
5
on the job(expression, adjective, keen, sharp)
5
warning signal(noun, expression, sign, guide)
4
give notice(verb, expression, report, advise)
4
on one's toes(expression, adjective, lively, attentive)
3
alarm bell(expression, warning, bell, siren)
3
high sign(noun, expression, sign, cry)
2
alarm clock
2
alarm signal
2
broad awake(expression, activity, care)
2
full of life(expression, adjective, keen, bright)
2
give fair warning(expression, order, prompt, admonish)
2
in the know(expression, familiar, careful, wise)
2
let in on(verb, expression, give, declare)
2
on one's guard(expression, adjective, care, wary)
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ChicagoSmart Define. 2016. "alert thesaurus" https://smartdefine.org/alert/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, alert thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/alert/thesaurus/synonyms>.
MLASmart Define. "alert thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/alert/thesaurus/synonyms>