word (ex. nubivagant), language (ex. Portuguese), topic (ex. love),
part of speech (ex. noun), origin (ex. origin: Latin), first letter (ex. A)
Sort of. I have paracosm, a detailed imaginary world that often features people, animals, or alien creatures, but it pretty specifically refers to such an imaginary world that is created by a child or young person. I don’t have a word that’s for a world created by adults. I’m sorry! That’s the best I’ve got.