Shoah: Shoah is another term for the Holocaust, derived from a Hebrew word meaning 'catastrophe' or 'destruction'. It's often used within Jewish communities when referring to this horrific event.
Nazi concentration camps: Nazi concentration camps were places where Jews, along with other groups deemed undesirable by the Nazis (such as Romani people, disabled individuals, political dissidents), were imprisoned under brutal conditions. Many died due to starvation, disease, forced labor or execution.
Genocide: Genocide refers to acts committed with intent to destroy, in whole or in part, a national, ethnic, racial or religious group. The Holocaust is one of history's most notorious examples of genocide.