Sadly It looks like after many years, there is no clear answer to this question. I was trying to find how to correctly describe Google‘s new product “Imagen”, which is an intentional misspelling of the word imagine, And pronounced “Imagine”. I asked ChatGPT and not sure where it came up with it, But when used in conjunction as the name of a product it suggested “Brandonym”, even though it made it clear that that’s not a real word and that there is no dictionary term for it.