Here are some other options, depending on the type of trees and the context:
* Forest: For a large, dense collection of trees.
* Stand: For a group of trees of the same species.
* Copse: For a small, dense group of trees, often deciduous.
* Spinney: Another term for a small, dense group of trees, often with tangled undergrowth.
* Thicket: For a dense, tangled group of trees and shrubs.
* Arbor: A single tree, but sometimes used to refer to a collection of trees in a garden setting.
* Orchard: For a group of fruit trees.
* Plantation: For a large, commercially managed area of trees.
The best choice depends on the specific situation and the desired effect.