Neologist

noun

1. One who introduces new words or phrases into a language.
2. Same as neologian.
3. One who introduces new words or new senses of old words into a language.
4. An innovator in any doctrine or system of belief, especially in theology; one who introduces or holds doctrines subversive of supernatural or revealed religion; a rationalist, so-called.
5. One who coins a new word or new words