Not so! Concentration camps predate the Nazis by quite a bit, and the term was/is used for all kinds of prison-like setups where inmates are held outside the rule of law.

E.g. US camps holding Japanese immigrants during WW2.

Sure, it might be somewhat hyperbolic (arguable, because ICE/current administration has few qualms dismissing constitutional rights whenever convenient), but the term is definitely not Nazi-exclusive (even the Germans had concentration camps long before Hitler, in Namibia)