General:
* Nightfall: The time when it gets dark.
* Nightingale: A bird known for its beautiful singing at night.
* Nightgown: A loose-fitting garment worn to bed.
* Nightmare: A frightening dream.
* Nightshade: A poisonous plant.
* Nightshirt: A loose-fitting shirt worn to bed.
* Nightcap: A cap worn in bed to keep warm.
* Nightstand: A small table beside a bed.
* Nighttime: The period of darkness between sunset and sunrise.
* Nightlife: The entertainment and social activities that occur at night.
More Specific:
* Mid-night: The middle of the night.
* Over-night: Lasting through the night.
* Weeknight: A night from Monday to Friday.
* Saturday-night: The night of a Saturday.
* Weekend-night: A night during the weekend.
* All-night: Lasting the whole night.
* Full-night: A complete night.
* Long-night: A night that seems very long.
* Dark-night: A night that is especially dark.
* Star-night: A night with many visible stars.
Figurative:
* Nightmarish: Terrifying or dreadful.
* Nightingale's voice: A beautiful and melodious voice.
* Night-black: Very dark.
This is not an exhaustive list, but it gives you a good starting point. There are many other compound words that include "night," depending on the specific context.