Car and Prowl car

Car noun - A self-propelled passenger vehicle on four wheels.

Prowl car and car are semantically related. In some cases you can replace phrase "Prowl car" with "Car", this terms are similar.

Prowl car noun - A car in which policemen cruise the streets; equipped with radiotelephonic communications to headquarters.

Car and prowl car are semantically related. Sometimes you can use "Car" instead a noun phrase "Prowl car".