This is a brainstorm that I'm not checking, but I'm pretty sure about:
Laser
Atom
Molecule
Proton
Neutron
Electron
Helicopter
Cell phone
Digital (derived from "digit" or number?)
Virtual
Internet
DNA
X-ray
Ultraviolet
Radio (wave)
I'm sure there's lots more :)
We actually have LOTS of empty words though, as far as I can tell. I haven't done tons of looking, but I think there are. I would suggest that once we start doing this, we put a lot of logic and categorization into it, maybe more so than Sudre did himself.