Forest

A forest was an area with a large number of trees.

Vashta Nerada usually lived in forests. (TV: Forest of the Dead)

The trees of Cheem were introduced as "the forest of Cheem." (TV: The End of the World)

The forests of Eden were dense even in the small section captured by Tryst's Continuous Event Transmuter. (TV: Nightmare of Eden)

The Gamma Forests were located on a planet. (TV: A Good Man Goes to War)

There were also forests on Earth's moon. (PROSE: Imperial Moon)

In 5345, the Eleventh Doctor, along with Cyril, Lily and Madge Arwell, visited a forest on a planet. (TV: The Doctor, the Widow and the Wardrobe)

The section of a pocket universe in which the Eleventh Doctor once got stuck was entirely forest. (TV: Hide)