- Definitions|2
- Thesaurus|550
- Abbreviations|0
| agile | |
| agog(keen, anxious, alert, careful, cautious) | |
| all ears | |
| all eyes | |
| antsy(adjective, informal, restless, insomniac) | |
| ardent | |
| assiduous | |
| aux aguets | |
| aware(keen, alert, careful, attentive, watchful) | |
| bright | |
| bundle of nerves(expression, adjective, idiom, anxious, unsettled) | |
| careful(adjective, keen, alert, restless, disturbed) | |
| changeable(anxious, unsettled, restless, uneasy, unruly) | |
| circumspect(adjective, keen, alert, careful, attentive) | |
| constant | |
| continuing | |
| custodial | |
| diligent | |
| dogged | |
| eagle-eyed |
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| APA | Smart Define. (2015). sleepless thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sleepless/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "sleepless thesaurus" https://smartdefine.org/sleepless/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, sleepless thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sleepless/thesaurus/synonyms>. |
| MLA | Smart Define. "sleepless thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/sleepless/thesaurus/synonyms> |