Patrol wagon and Police car

Patrol wagon noun - Van used by police to transport prisoners.

Police car and patrol wagon are semantically related In some cases you can use "Police car" instead a noun phrase "Patrol wagon".

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

Patrol wagon and police car are semantically related in motor vehicle used by law enforcement topic. You can use "Patrol wagon" instead a noun phrase "Police car".