Neology

Neology is the coining of new words, from the Greek root (Neo-: new, and Logos-: the word). This practice may be compared with other less mentally intensive, although sometimes computationally intensive forms of wordplay such as anagrams and acrostics, as well as fully developed theories or practices of language, such as aphorisms, poetics, and literary essays.

Sometimes neology is seen as related to the development of new isms, since a new word can mean a new idea.