Synonyms|231Antonyms|67|Broader|2Narrower|0Related|250
1
unswerving
1
untiring
1
unwavering
1
unwearied
1
unwearying
1
unwinking
1
up
1
utterly attentive
1
vehement
1
waiting on(expression, keen, anxious, alert, careful)
1
wandering(anxious, unsettled, restless, uneasy, unruly)
1
weariless
1
with eyes peeled(expression, idiom, keen, alert, careful)
1
with open eyes(expression, idiom)
1
with weather eye open(expression, idiom, keen, anxious, careful)
1
worried(adjective, restless, insomniac)
1
zealous
0
able to recognize(expression, idiom, awake, insomniac)
0
acquainted(awake, insomniac)
0
aesthetic(awake, insomniac)
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APASmart Define. (2015). sleepless thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sleepless/thesaurus/synonyms
ChicagoSmart Define. 2015. "sleepless thesaurus" https://smartdefine.org/sleepless/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, sleepless thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sleepless/thesaurus/synonyms>.
MLASmart Define. "sleepless thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/sleepless/thesaurus/synonyms>