I think the main thing is not to disintegrate to that level oneself. If he threatens violence towards you or another member of the household I'd tell him that if he does that you will call the police and report him for assault. If he gets angry... I'd say 'I'm going to walk away now so you have time to compose yourself and we can discuss this later'.

I guess... I'd look for an alternative place to live, personally... I'm not sure how the above would go down. But you are certainly within your rights to report assault.

I'm not sure if it would be possible to have a conversation with him about this while he is calm. Whether he thinks he has problems managing anger and whether he might be willing to take an anger management class (before the courts order him to, for example).

Calling him names... Is only likely to result in his feeling angrier...