prison camp vs POW camp

prison camp and POW camp both are nouns.

Word	Noun	Adjective	Verb	Adverb
prison camp	Yes	No	No	No
POW camp	Yes	No	No	No

As nouns, prison camp and POW camp are synonyms defined as:

Other synonyms of prison camp include internment camp, prisoner of war camp.

prison camp (noun)	POW camp (noun)
a camp for trustworthy prisoners employed in government projects	a camp for prisoners of war
a camp for prisoners of war