Actual entity is a term coined by Alfred North Whitehead

Alfred North Whitehead

Alfred North Whitehead, OM FRS was an English mathematician who became a philosopher. He wrote on algebra, logic, foundations of mathematics, philosophy of science, physics, metaphysics, and education...

to show the basic realities that shape all things. Actual entities are clusters of events that shape reality. Actual entities do not discuss the substance of anything but talk about how something is happening. The universe is the case based on a series of actual entities intermingled with one another.