What is a synonym for the word fun?

Here are some synonyms for "fun," depending on the context:

General:

* Enjoyable

* Pleasurable

* Amusing

* Delightful

* Entertaining

* Engaging

* Exciting

* Gratifying

* Joyful

* Merry

* Hilarious

More specific:

* For children: Playful, whimsical, silly, giddy

* For adults: Stimulating, invigorating, exhilarating, rewarding

* For activities: Thrilling, adventurous, challenging, rewarding, stimulating

The best synonym will depend on the specific context you are using the word in.