If the Boxer is a dog; the answer is to bark, or the sound of barking. (That is, "arfs", "yaps", yowls, etc.)
The outburst took him by surprise.There was a big outburst in the kitchen.
There is no homophone for outburst that's correct.
An outburst is a sudden and violent release or outpouring.
An emotional outburst is when someone over reacts to a situation.
That is the correct spelling of "outburst" (a sudden emotional expression).
The trial was disrupted by an angry outburst from one of the jurors.
You cannot play the game Outburst online for free, you have to purchase the game first.
Outburst is a noun and so doesn't have a past tense. Only verbs have tenses.
The Office The Outburst - 2008 was released on: USA: 20 November 2008 (internet)
Doh
A bursting forth.
When the Boxers attacked China was referred to as the Boxers Rebellion.