Did Chaucer actually invent any words?

Shakespeare mad something like 1700 of them...many which are in use today in the English language...

...and of course we have the word "marijuana" whichs comes from thhe words "Mary Jane."

What in the world ever became of Sweet Jane?
She lost her sparkle, you know she isn't the same
Livin' on reds, vitamin C and cocaine
All a friend can say is 'isn't it a shame'