patrol wagon vs police wagon

patrol wagon and police wagon both are nouns.

Word	Noun	Adjective	Verb	Adverb
patrol wagon	Yes	No	No	No
police wagon	Yes	No	No	No

As nouns, patrol wagon and police wagon are synonyms defined as:

patrol wagon and police wagon: van used by police to transport prisoners

Other synonyms of patrol wagon include black Maria, paddy wagon, police van, wagon.

patrol wagon (noun)	police wagon (noun)
van used by police to transport prisoners	van used by police to transport prisoners