Buzzfeed has a list of SciFi words created by SciFi authors and writers.
Tolkien heads the list with a total of five. He also was the earliest published with The Hobbit in 1937. G. R. R. Martin and J. K. Rowling come in second with four each, followed by Orwell, Phillip K. Dick, Douglas Adams, Kurt Vonnegut, Robert Heinlein and William Gibson.
tv shows and movies have contributed new words as well, with Star Trek leading the way.
click on the link for the rest of the list.