That's EXACTLY the problem. There's a way to flavor things as 'Frankenstein' as opposed to 'Magic necromancers' and Paradox has not done that.
What would it be called though?
Necromonger popped into my head but references aside it would roughly translate to death collector/collector of Death which sounds more like someone collecting bodies than reanimating them.
Although Necromancer is far from scientific sounding there is precident for its usage in Sci Fi as far back as the 60's atleast.
A substitute would be preferred to separate it from the mystical image that necromancer provokes though I would not say it is absolutely needed.