Neologizer
"Neologizer" in a Sentence (2 examples)
The most verbally innovative of our authors and our all-time champion neologizer, Shakespeare made up more than 8.5 percent of his written vocabulary.
For most words, the neologizer (or neologizers -- new words, like teenage trends or the calculus, are likely to pop up at the same time in very different places) is anonymous, although there are some exceptions.