"make a separation" is a correct and usable phrase in written English.
You can use this phrase to indicate that two or more things need to be divided or distinguished from each other. For example, "We need to make a separation between the healthy foods and the unhealthy foods in our diet."
I hate to make a separation from my books.
There's still a lot of season left, and we still have time to make a separation".
You can't make a separation along the Green Line" — that is, the pre-1967 borders.
We add to the trigger function a Time to Digital Converter (TDC) in order to make a separation between events.
Though they could and did oppose individual kings, the prophets could not make a separation between Yahweh and the reign of his chosen king or dynasty.
As much as Ramírez enjoys discussing hitting with Rodriguez, he made sure to make a separation between them and climbing to 500.
Polling done by the I.O.C. and the U.S.O.C. shows that people have made a separation between corrupt officials and the Games themselves.
His defenders retaliated by devising a more complicated image of their man, one in which irony played a crucial role, which allowed for an element of deliberate provocation, and which insisted on making a separation between private opinions and public writings.
This makes a separation of channel impulse response (CIR)s from different MIMO channels possible by windowing.
The path to God, she says, "leads out of the world, out of the worlds ways, fashions, and customs, and this makes a separation from the world" (Fell 1710, 65).
The chemical similarity between zirconium and hafnium made a separation difficult and, without knowing what to look for, hafnium was left undiscovered, although all samples of zirconium, and all of its compounds, used by chemists for over two centuries contained significant amounts of hafnium.
