Theists argue that in contrast to our natural world, gods are supernatural and part of some supernatural world. The distinction is very convenient for believers; yet the word ‘supernatural’ exists only because it was conceived by them.
The truth is that the notion of “the supernatural” is itself a wholly human invention, no less than Bertrand Russell’s orbiting teapot is a human invention---and whose 'orbiting-teapot level' of reality in our wondrous natural Universe is exactly zero.
We know that the 'natural' is actuality, reality, rationality. We find it everywhere we look.
By contrast, the 'supernatural' is not at all what the dictionaries define it as. Probably all dictionaries were written by religious believers.
Definitions from the Oxford English Dictionary exemplify:
Supernatural as adjective. "That is above nature; transcending the powers or the ordinary course of nature."
Supernatural as noun: "That which is supernatural." . . . etc.
Such definitions presuppose that there is a ‘supernatural’, and therefore what is not natural is supernatural---whereas I equate the word ‘supernatural’ with ‘fictional’ because the ‘supernatural’ is no more than an idea, a hypothesis, an unnecessary concept.
In short, the 'supernatural' is nothing but religious-fictional nonsense.
‘Supernatural’ means fictional, and we should say so to theists when put to the argument.
Consequently, instead of allowing them to assert that everything is either natural or supernatural, we should correct them by saying that everything is either natural or fictional.