What is the comparative or superlative forms of delightful?

Here's how you can express different degrees of "delightful":

* Comparative: More delightful

* Superlative: Most delightful

While you can use these forms grammatically, "delightful" itself already implies a high degree of pleasure. It's often more effective to use other words to convey different levels of enjoyment:

* Slightly enjoyable: Pleasant, agreeable, enjoyable

* Very enjoyable: Thrilling, exhilarating, wonderful, fantastic

* Extremely enjoyable: Ecstatic, blissful, rapturous