prowl car vs police car

prowl car and police car both are nouns.

Word	Noun	Adjective	Verb	Adverb
prowl car	Yes	No	No	No
police car	Yes	No	No	No

As nouns, prowl car and police car are synonyms defined as:

prowl car and police car: a car in which policemen cruise the streets; equipped with radiotelephonic communications to headquarters

Other synonyms of prowl car include cruiser, patrol car, police cruiser, squad car.

prowl car (noun)	police car (noun)
a car in which policemen cruise the streets; equipped with radiotelephonic communications to headquarters	a car in which policemen cruise the streets; equipped with radiotelephonic communications to headquarters