General terms:
* Neologism: This is the most common term for a newly coined word or phrase.
* New word: This is a simple and straightforward term.
* Novel term: This emphasizes the newness and uniqueness of the word or phrase.
More specific terms:
* Coinage: This refers to the act of creating a new word or phrase.
* Innovation: This implies that the new word or phrase is a creative and original contribution.
* Slang: This refers to informal language used in particular groups or contexts.
* Jargon: This refers to specialized vocabulary used by a specific profession or group.
Terms related to the process:
* Word formation: This refers to the processes by which new words are created, such as compounding, derivation, or blending.
* Lexical innovation: This is a more technical term for the creation of new words or phrases in a language.
Ultimately, the best term to use depends on the specific context and what you want to emphasize.