What is the comparative form of awful?

The comparative form of "awful" is awfuller. However, it's not often used in modern English. The more common and preferred way to express a higher degree of awfulness is to use more awful.

Here's why:

* Awfuller sounds somewhat archaic and is not as common in contemporary English.

* More awful is grammatically correct and sounds more natural to native English speakers.

So, while "awfuller" is technically the comparative form, "more awful" is the preferred and more widely used option.