Sudden and Sharp:
* Blurt: To say something suddenly and without thinking.
* Erupt: To speak with sudden and intense emotion, like a volcano erupting.
* Exclaim: To say something suddenly and loudly, often in surprise or excitement.
* Shout: To speak loudly and forcefully.
Sudden but not necessarily Sharp:
* Interject: To interrupt a conversation to say something.
* Pipe up: To speak up suddenly, often after being quiet.
Sharp but not necessarily Sudden:
* Snap: To speak in a curt and unfriendly way.
* Bark: To speak in a sharp and abrupt way, like a dog.
* Spit: To speak with anger and hostility.
The best word for you will depend on the specific situation and the emotion you want to convey.