Quote: I'm not sure if death is a fear of H's or not.
Of course it is - a BIG one! It is NOT normal to think that a 5 year old will be traumatized by just hearing the word dead. And it wasn't just the issue of your child hearing it - your H was becoming very uncomfortable hearing you use the word with him during the conversation.
I think this is an instance of him projecting his own fear onto the kid.