- Definitions|1
- Thesaurus|230
- Abbreviations|0
| seeing(awake, sleepless) | |
| sensible(awake, sleepless) | |
| sensitive to(expression, awake, sleepless) | |
| sentient(awake, sleepless) | |
| sick person(expression, idiom) | |
| sleeping difficulty(expression, idiom) | |
| sufferer | |
| supraliminal(awake, sleepless) | |
| sure(awake, sleepless) | |
| suspicious | |
| syphilitic | |
| tension | |
| understanding(awake, sleepless) | |
| vigilance | |
| wary | |
| wide awake(expression, restless, awake, sleepless) | |
| wise to(expression, awake, sleepless) | |
| with it(expression, awake, sleepless) | |
| witting(awake, sleepless) | |
| aesthetic(awake, sleepless) |
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| APA | Smart Define. (2015). insomniac thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/insomniac/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "insomniac thesaurus" https://smartdefine.org/insomniac/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, insomniac thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/insomniac/thesaurus/synonyms>. |
| MLA | Smart Define. "insomniac thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/insomniac/thesaurus/synonyms> |