Are you a fan of Ayn Rand? (I am.) Just curious, as she insists on not calling a concept by a name (word) already taken by something else, which is what you're

Are you a fan of Ayn Rand? (I am.) Just curious, as she insists on not calling a concept by a name (word) already taken by something else, which is what you're alleging in this case. Tangentially, I think it may actually be appropriate to use "universe" to refer to a cosmological phenomenon (as modern physicists do), and "existence" to refer to the metaphysical phenomenon you are describing. I guess I'd have to research the etymology of "universe" before I could take a more definitive stand.