squad car vs prowl car

squad car and prowl car both are nouns.

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

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

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

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

squad car (noun)	prowl 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