General terms:
* Tree removal (most common and straightforward)
* Tree felling (emphasizes cutting down)
* Tree clearing (focuses on removing trees from an area)
* Tree disposal (highlights what happens to the tree after removal)
More specific terms:
* Stump removal (focuses on removing the remaining stump)
* Debris removal (refers to removing branches, leaves, and other tree parts)
* Logging (for removing trees in a commercial context)
Figurative terms:
* Tree eradication (strong, forceful language)
* Tree excision (medical term that implies surgical removal)
The best noun to use depends on the specific context and what you want to emphasize.