Bird dog and Sergeant

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

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

Sergeant noun - Any of several noncommissioned officer ranks in the Army or Air Force or Marines ranking above a corporal.

Bird dog and sergeant are semantically related in investigator of crime topic. Sometimes you can use "Bird dog" instead a noun "Sergeant".