What is the comparative and superlative of fantastic?

There isn't a straightforward comparative and superlative for "fantastic" in the traditional sense. This is because "fantastic" is already a superlative adjective, meaning "extremely good or impressive."

Here's how to express degrees of "fantastic":

More Fantastic:

* More fantastic: This works, but it's less common and can sound a bit awkward.

* Even more fantastic: This is a smoother alternative.

* More wonderful: This is a good substitute if you want to avoid repetition.

* More amazing: This is another suitable alternative.

Most Fantastic:

* Most fantastic: This is perfectly acceptable, but it's often used in a humorous or exaggerated way.

* The most fantastic: This emphasizes the superlative quality.

* The most amazing: This offers a more formal alternative.

Ultimately, the best choice depends on the context and desired level of formality.