Why don't you just cut to the chase and call it volume. Everyone understands volume, and that noting can be a measurement within a volume. All these word inventions only cause confusion, then lead to weird theories no one at all discusses or acknowledges. Then things break down and facepalm at about as confusing a rate as preterism.
Ultimately, space is a result. In fact time-space is constantly expanding. Not just to an outer edge, but within the volume of space it is expanding constantly, being added to, and expanding apart. Don't believe me?
What is the Universe Expanding Into? from one of my fav younoob channel subscriptions.
We already know noting is nothing, and that noting is always being pulled/pushed into nothing becoming something or volume. This has even visible results, even though we cant actually touch time and space, but we observe the results. Even at the quantum mechanic level things are ever expanding and changing by way of order, and often at a statistically impossible order seemingly.