When facing Obi-wan and Anakin, Count Dooku said:
Your swords, please. We don't want to make a mess of things in front of the Chancellor.
Wasn't it called a “lightsaber”? Why did he say “sword” instead? It seems like saying “your spears please” when asking for Jango Fett’s blaster pistols, or "Your eggs, please" for a thermal detonator.
Maybe it was just a slip of the tongue of him with a sudden specter?