Synonyms|231Antonyms|67|Broader|2Narrower|0Related|250

62 entries under insomniac topic. ×

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known
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noticing
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noting
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observing
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on to(expression, awake)
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perceiving
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percipient
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recognizing
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remarking
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responsive
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seeing
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sensible
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sensitive to(expression, awake)
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sentient
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supraliminal
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sure
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understanding
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wide awake(expression, adjective, cautious, awake, guarded)
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wired(adjective, restless)
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wise to(expression, awake)
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APASmart Define. (2015). sleepless thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/sleepless/thesaurus/synonyms
ChicagoSmart Define. 2015. "sleepless thesaurus" https://smartdefine.org/sleepless/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, sleepless thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/sleepless/thesaurus/synonyms>.
MLASmart Define. "sleepless thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/sleepless/thesaurus/synonyms>