2
undeviating(adjective, perseverance)
2
unwearied
1
acute(keen, anxious, alert, careful, cautious)
1
agog(keen, anxious, alert, careful, cautious)
1
all ears(expression, adjective, alert, careful, cautious)
1
anxious(keen, alert, careful, attentive, watchful)
1
ardent
1
aware(adjective, keen, alert, careful, attentive)
1
bright
1
businesslike
1
cautious(adjective, keen, alert, careful, attentive)
1
chary(adjective, alert, careful, cautious, attentive)
1
circumspect(adjective, keen, alert, careful, cautious)
1
continuing
1
dogged
1
enduring
1
energetic
1
faithful
1
fervent
1
glued(adjective, alert, careful, cautious, attentive)
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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>