* Nocturnal: Relating to or occurring in the night.
* Noctilucent: Describing clouds that are visible at night due to their high altitude.
* Noctambulist: A person who sleepwalks.
* Noctambulation: The act of sleepwalking.
* Noctivagant: Wandering or roaming at night.
* Nocturne: A piece of music, typically for piano, suggestive of night.
* Noctifer: A person or thing that brings light at night.
* Noctivigilant: Staying awake at night.