Collocations for forest - noun

dense, thick
impenetrable
deep
dark
native, natural
national
ancient, old, primeval, virgin
mature, old-growth
rain (usually rainforest), tropical
coniferous, deciduous
hardwood
beech, birch, pine, etc.

stretch, tract
a large stretch of virgin forest

plant
clear, cut down, destroy
Forest is being cleared to make way for new farming land.

conserve, protect
manage
be covered by, be covered in
Much of Europe was once covered in forest.

enter
He warned her never to enter the forest at night.

stretch
Thick forest stretched as far as the eye could see.

surround
the forest surrounding the village

tree
floor
canopy
land
fire
ranger
management

in a/the forest
They got lost in the forest.

through a/the forest
We slashed our way through the dense forest.

the edge of the forest, the heart of the forest, the middle of the forest