I was in a games workshop toy shop and in casual conversation mentioned to my friend saying the phrase 'not beyond the realm of possibility' his response was 'there's realms of possibility? what about a realm of Causality?', it was only until I reached secondary school learning about Platos' world of pure forms and other platonic ideas I considered the realm of causality as a dimension or world of pure form.

The latin speaking people developed this idiosyncratic word as causa, defined today as the relationship between cause and effect also the principal that everything has a cause, I don't know if this extends to action for reaction or chaos theory but defining a world/realm of causality would encapsulate those concepts?