You probably see it quoted all the time: "Shakespeare invented the words assassination and bump!"
It is inaccurate. What does it mean to invent a word? Can history ever really trace the first person to string together a series of letters in a way that no one else ever did?
It is more correct to say that Shakespeare represents the first recorded use of the word. In that case, the statement is true: assassination appears in Macbeth, and bump (as a noun, not like to bump into somebody) appears in Romeo and Juliet.