This is a very rare use case, but one where i definetly found them very useful. Similar to another answer mentioning reverse-dictionary lookup, i used llms for reverse-song/movie lookup. That is, i describe what i know about the song/movie (whatever else, could be many things) and it gives me a list of names that i can then manually check or just directly recognize.

This is useful for me because i tend to not remember names / artists / actor names, etc.