What’s a neutral label for people who see a significant chance of AI killing everyone?

A user asks for a neutral label for someone who thinks there is a significant chance AI will kill everyone through superintelligence or loss of control. They say they suggested “singularist” in a piece three years earlier, but it hasn’t caught on. A reply proposes “X-riskers” and notes that “safetyist” sometimes gets used—calling it an apparent improvement over “doomer,” but “also not great.”