If we use Spiritual and and Physical along these lines, then we are going to need 2 other words for what most people meean by "spiritual vs. physical".... or, better,
"supernatural" vs. "natural".
If we restrict "natural" to mean ordinary events that follow natural law,
we are still left with a remaining, difficult and obscure category:
"ordinary events that are construed to be non-lawful, and not under intelligent direction"
Some might consider the motion of quarks to be non-lawful in some aspects... but unlikely to be under "miraculous" and/or "intelligent" control by Deity.
And I'm content to allow "authentically chaotic" quantum behaviors in under the "Natural" umbrella.
"Supernatural" or "Miraculous" would cover chaotic or non-lawful events under specific control of Diety - - excluding, for the time being, "providential" events that just seem to be lucky or wonderful or important from a human perspective.