(as a reverse dictionary, for example)

Thanks for putting a name on that! That's actually one of the few useful purposes I've found for LLMs. Sometimes you know or deduce that some thing, device, or technique must exist. The knowledge of this thing is out there, but you simply don't know the term to search for. IMO, this is actually one of the killer features of LLMs. It works well because whatever the LLM is outputting is simply and instantly verifiable. You can describe the characteristics of something to the LLM and ask it what thing has those characteristics. Then once you have a possible name, you then look that name up in a reliable source and confirm it. Sometimes the biggest hurdle to figuring something out is just learning the name of a thing. And I've found LLMs very useful as a reverse dictionary. Thanks for putting a name on it!