Generally, your metaphors should not rely on comparison to a pretty traumatic event that has happened to quite a few people, many of whom might be around you without you knowing.
Just letting you know the reality that a lot of people view "stillborn" events as particularly traumatic. I'm not going to spend a lot of time arguing about this because it's a pretty simple point.
It's up to you to choose what kind of person you want to be, I don't have control over what you say.
I think the difference is that the term "Dead" is used in a lot of different contexts. E.g. Battery is dead. Stillborn is not, and it mainly associated used in one very traumatic context.
Anyone who is avoiding "master, black list or sanity check" probably thinks abortion is super awesome and that the term "abort" should never be stigmatized.
Best not to worry about such silly things and keep writing code.