What are the comparative or superlative of word fun?

The word "fun" doesn't have comparative or superlative forms in the traditional sense. It's an adjective that describes a feeling or activity, not something that can be compared in terms of degree.

However, there are ways to express the concept of "more fun" or "most fun" using other words:

* More enjoyable: This is a more formal way of saying something is "more fun".

* More exciting: This implies a higher level of excitement and engagement.

* More entertaining: This focuses on the ability to keep someone amused.

* The most enjoyable: This is the superlative form of "enjoyable", suggesting the highest level of enjoyment.

* The most exciting: This suggests the highest level of excitement.

* The most entertaining: This implies the highest level of amusement.

Ultimately, the best way to express "more fun" or "most fun" depends on the context and the specific nuance you want to convey.