General excitement:
* Enthusiasm
* Thrill
* Eagerness
* Arousal
* Passion
* Fever
* Buzz
* Vivacity
* Exuberance
* Animation
* Stimulation
* Delight
* Joy
More specific excitement:
* Anticipation: Looking forward with excitement.
* Elation: Extreme happiness and excitement.
* Ecstasy: Intense pleasure and excitement.
* Frenzy: A state of great excitement and activity.
* Rapture: A state of intense joy and pleasure.
* Jubilation: A feeling of great joy and excitement.
The best synonym to use depends on the specific situation and the tone you want to convey.