Bird dog and Plainclothes officer

Bird dog noun - A gun dog trained to locate or retrieve birds.

Plainclothes officer and bird dog are semantically related in investigator of crime topic. In some cases you can use "Plainclothes officer" instead a noun phrase "Bird dog".

Bird dog and plainclothes officer are semantically related in investigator of crime topic. Sometimes you can use "Bird dog" instead a noun phrase "Plainclothes officer".