internment camp vs prisoner of war camp

internment camp and prisoner of war camp both are nouns.

Word	Noun	Adjective	Verb	Adverb
internment camp	Yes	No	No	No
prisoner of war camp	Yes	No	No	No

As nouns, internment camp and prisoner of war camp are synonyms defined as:

Other synonyms of internment camp include POW camp, prison camp.

internment camp (noun)	prisoner of war camp (noun)
a camp for prisoners of war	a camp for prisoners of war