Avarice of the Ascendant
The Known Realm is term that folk use to describe the physical world they inhabit, but is also used by religious and arcane scholars to describe their home plane. When it is referred to colloquially, it typically means the known parts of the world to which people have traveled and explored. That would include the continents of Soros and Gharell, with the Alluviatic Ocean separating them. There are unexplored landmasses in the world, not considered part of the Known Realm, which are called the Frontier Lands. The world as whole, known and unknown, is called Tyr.
Planes apart from this one are often referred to as the Realms Beyond.