- Definitions|1
- Thesaurus|162
- Abbreviations|0
| vigilant(adjective, alert, careful, cautious, disturbed) | |
| wakeful(adjective, keen, anxious, alert, careful) | |
| watchful(adjective, keen, alert, careful, disturbed) | |
| awake(adjective, awareness, wakeful) | |
| sleepless(adjective, keen, anxious, careful, restless) | |
| wide-awake(adjective, keen, anxious, alert, careful) | |
| alert(adjective, keen, careful, restless, cautious) | |
| attentive(adjective, keen, alert, careful, cautious) | |
| alive(adjective, wakeful) | |
| constant(adjective, perseverance) | |
| steadfast(adjective, perseverance) | |
| steady(adjective, perseverance) | |
| unfaltering(adjective, perseverance) | |
| unflagging(adjective, perseverance) | |
| unflinching(adjective, perseverance) | |
| assiduous | |
| diligent | |
| indefatigable | |
| industrious | |
| insomniac(adjective, wakeful) |
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| APA | Smart Define. (2015). unsleeping thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unsleeping/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unsleeping thesaurus" https://smartdefine.org/unsleeping/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, unsleeping thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unsleeping/thesaurus/synonyms>. |
| MLA | Smart Define. "unsleeping thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/unsleeping/thesaurus/synonyms> |