Synonyms|139Antonyms|1|Broader|0Narrower|0Related|22
1
guarded(adjective, keen, anxious, alert, careful)
1
hard
1
hardworking
1
heedful(adjective, alert, careful, cautious, disturbed)
1
hooked(adjective, alert, careful, cautious, attentive)
1
immutable
1
inalterable
1
indomitable
1
insistent
1
intent
1
invincible
1
laborious
1
lasting
1
looking for(expression, keen, anxious, alert, careful)
1
looking to(expression, keen, anxious, alert, careful)
1
loyal
1
never tired(expression, idiom, activity)
1
nimble
1
not missing a trick(expression, adjective, idiom, alert, careful)
1
notable
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APASmart Define. (2015). unsleeping thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unsleeping/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsleeping thesaurus" https://smartdefine.org/unsleeping/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unsleeping thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unsleeping/thesaurus/synonyms>.
MLASmart Define. "unsleeping thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unsleeping/thesaurus/synonyms>