Is shouting abuse?
Well ultimately, yes, shouting is abusive especially when it's combined with name calling.
If it's done to belittle someone or put someone down then I can't see how it can be anything but abusive. If there's no name calling or putting someone down involved, I'd still say shouting is a pretty ineffective way of communicating.
I feel a little hypocritical with this though, when I get emotional I tend to raise my voice or shout but I recognise that as an issue I have and probably need help with. There are better ways to communicate and channel your emotion.
That being said, I don't want to come across as squeaky clean here because it's something I struggle with myself.