police cruiser vs patrol car

police cruiser and patrol car both are nouns.

Word	Noun	Adjective	Verb	Adverb
police cruiser	Yes	No	No	No
patrol car	Yes	No	No	No

As nouns, police cruiser and patrol car are synonyms defined as:

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

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

police cruiser (noun)	patrol 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