Synonyms|139Antonyms|1|Broader|0Narrower|0Related|22
1
obstinate
1
on alert(expression, keen, anxious, alert, careful)
1
on guard(expression, adjective, keen, anxious, alert)
1
on the alert(expression, adjective, idiom, alert, careful)
1
on the lookout(expression, adjective, keen, alert, careful)
1
on the qui vive(expression, adjective, idiom, keen, anxious)
1
on the watch(expression, adjective, idiom, alert, careful)
1
on toes(expression, keen, anxious, alert, careful)
1
painstaking
1
patient
1
permanent
1
persistent
1
pertinacious
1
plugging
1
preoccupied
1
prepared(adjective, alert, careful, cautious, aware)
1
prompt
1
rapt
1
relentless
1
see after(expression, adjective, alert, careful, cautious)
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APASmart Define. (2015). unsleeping thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unsleeping/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsleeping thesaurus" https://smartdefine.org/unsleeping/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unsleeping thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unsleeping/thesaurus/synonyms>.
MLASmart Define. "unsleeping thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/unsleeping/thesaurus/synonyms>