Strong, intense joy:
* Ecstasy: A state of overwhelming happiness or delight.
* Rapture: An intense feeling of pleasure or joy.
* Bliss: Perfect happiness; contentment.
* Exuberance: A feeling of great happiness and excitement.
Gentle, peaceful joy:
* Contentment: A state of happiness and satisfaction.
* Serenity: A state of peace and tranquility.
* Delight: A feeling of great pleasure or satisfaction.
* Pleasure: A feeling of happy satisfaction and enjoyment.
Other words that express joy:
* Happiness: A general state of well-being and contentment.
* Cheer: A state of good spirits and enthusiasm.
* Gladness: A feeling of happiness and satisfaction.
* Jubilation: A feeling of great joy and celebration.
* Euphoria: A feeling of intense happiness and well-being.
* Elation: A feeling of great joy and excitement.
* Thrill: A feeling of intense excitement and pleasure.
* Exultation: A feeling of triumph and joy.
The best word to use will depend on the specific context and the desired tone.