1. Of or relating to or formed by trees
   - arboreal, arborary, arborous

See also: arbor [N. Amer, Austral], tree

• nighted
• nightfall
• nightgown
• nighthawk
• nightie
• nightingale
• nightjar
• nightlife
• nightlong
• nightly
• nightmare
• nightmarish
• nightrider
• nightshade
• nightshirt
• nightspot
• nightstand
• nightstick
• nighttime
• nightwalker
• nightwear
• nightwork
• nighty
• nigra
• nigrescent