Shorter Oxford English Dictionary What Is The Word For: Someone Who Creates His/her Own Words/terms?

What is the word for: Someone who creates his/her own words/terms? - shorter oxford english dictionary

I remember this before, pretty sure that he is a "suffix" and begins with ev "Locque" or "" prefix, but could be wrong. Real words only. Should the Unabridged Oxford English Dictionary to be found (I have the 20 vol. Set) or U.S. Webster's Unabridged Dictionary (much shorter), so you can get the best answer. If not available, you must provide two sources show that they are correct.