Treetop (noun)

The uppermost branches and foliage of a tree.

Origin:

Compound word, tree+top.

Examples:

1. The bird nested in the treetop.
2. The monkey swung from treetop to treetop.
3. The view from the treetop was breathtaking.
4. The treetop was swaying in the wind.
5. The children climbed to the treetop to have a picnic.