What are antonyms of pencil shapner?

The word "pencil sharpener" describes a tool, so it doesn't really have antonyms in the traditional sense. However, you could consider these ideas:

* Tools that do the opposite:

* Pencil duller: (Although this doesn't exist as a real tool)

* Pencil eraser: (Removes graphite, not sharpens it)

* Alternative ways to sharpen a pencil:

* Knife: (Can be used to sharpen, but not as effective or safe)

* Sandpaper: (Can be used to sharpen, but not as precise)

* Alternatives to a pencil:

* Pen: (Doesn't need sharpening)

* Stylus: (Digital writing tool)

Ultimately, the best "antonym" depends on the specific context you're considering.