Put a name to specific concepts, ideas, or emotions that have no name yet. Try to make it interesting.
Example - musical extrapolation: the experience of listening to a song you have never heard and predicting the next notes, or the next possible notes, which may or may not be better fitting than the existing notes.
If you are wondering if something has a name or not, ask it here.
If you know of obscure or strange words like that which are already defined, you can share those too.