Strong:
* Thrilling: Conveying a sense of intense excitement and suspense.
* Electrifying: Full of energy and excitement, often in a sudden and powerful way.
* Enthralling: Completely captivating and holding one's attention.
* Rousing: Stimulating excitement and enthusiasm.
* Stirring: Evoking strong emotions and feelings.
* Exhilarating: Producing a feeling of great happiness and excitement.
Moderate:
* Interesting: Holding one's attention and curiosity.
* Engaging: Involving and captivating.
* Intriguing: Arousing curiosity or interest.
* Stimulating: Encouraging mental activity or creativity.
* Invigorating: Giving new energy or enthusiasm.
Informal:
* Awesome: Extremely impressive or exciting.
* Cool: Stylish, impressive, or exciting.
* Rad: Excellent, exciting, or impressive.
* Sweet: Pleasurable or exciting.
* Neat: Attractive or interesting.
Other synonyms:
* Animated: Full of life and energy.
* Lively: Full of energy and activity.
* Spirited: Full of enthusiasm and energy.
* Vibrant: Full of energy and life.
* Dynamic: Full of energy and change.
The best synonym for "exciting" will depend on the context and the specific nuance you want to convey.