What are the words that not found in dictionary called?

There isn't one specific word for words not found in a dictionary. Here's why and some terms that are relevant:

* Dictionaries are not exhaustive: Dictionaries are constantly evolving to include new words and terms.

* Language is dynamic: New words are created all the time, especially through slang, internet culture, and technical advancements.

* Context matters: A word might not be in a general dictionary but might be found in a specialized dictionary (like a medical dictionary or a slang dictionary).

Here are some terms that could be used to describe words not found in a dictionary:

* Neologisms: Newly coined words or expressions.

* Slang: Informal language or vocabulary used by a particular group of people.

* Jargon: Specialized vocabulary used by a particular profession or group.

* Made-up words: Words created for specific purposes, often in creative writing or games.

* Unlisted words: A neutral term simply meaning a word not included in a particular dictionary.

Ultimately, the best term depends on the context and the specific word in question.