Answer: The easiest way to think of it is that Kush is a historical term designating a cultural continuity and succession of state(s) from a certain period covering 2500–3000 years. Nubia to this day, is a region within modern southern Egypt and north Sudan, whose residents went by various names
What did Nubians create that was considered the finest in the ancient world? - Quora
How do we know that the Ancient Kingdom of Kush was a black civilization? Is there any genetic/DNA evidence? - Quora
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War between Rome and Kingdom of Kush « IMPERIUM ROMANUM
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Is Kush and Nubia the same? - Quora
Are images of ancient Nubians/Kushites or Puntites really all that different than the images of ancient Egyptians? - Quora
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Were the ancient Kushites the same people as the ancient Egyptians? - Quora
What was the DNA of the ancient Kushites? - Quora