Synonyms|231Antonyms|67|Broader|2Narrower|0Related|250
1
on edge(expression, adjective, anxious, unsettled, restless)
1
on the
1
on the qui vive(expression, idiom, keen, alert, careful)
1
on the watch(expression, idiom)
1
on toes(expression, keen, anxious, alert, careful)
1
patient
1
permanent
1
perseverant
1
persevering
1
persistent
1
persisting
1
pertinacious
1
plodding
1
plugging
1
preoccupied
1
prompt
1
prudent
1
qui vive
1
quick
1
rapt
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APASmart Define. (2015). sleepless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sleepless/thesaurus/synonyms
ChicagoSmart Define. 2015. "sleepless thesaurus" https://smartdefine.org/sleepless/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, sleepless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sleepless/thesaurus/synonyms>.
MLASmart Define. "sleepless thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/sleepless/thesaurus/synonyms>