"Billiard" is from a French word meaning "stick of wood"; I can't find out the etymology of "milliarde." My usual site says that it's "million" with a changed suffix, which is not terribly helpful.
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Gillian
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"