labour camp vs labor camp

labour camp and labor camp both are nouns.

Word	Noun	Adjective	Verb	Adverb
labour camp	Yes	No	No	No
labor camp	Yes	No	No	No

As nouns, labour camp and labor camp are synonyms defined as:

labour camp and labor camp: a penal institution for political prisoners who are used as forced labor

labour camp (noun)	labor camp (noun)
a penal institution for political prisoners who are used as forced labor	a penal institution for political prisoners who are used as forced labor