Smoke screen and Stool pigeon

Smoke screen noun - (military) screen consisting of a cloud of smoke that obscures movements.

Stool pigeon and smoke screen are semantically related. In some cases you can use "Stool pigeon" instead a noun phrase "Smoke screen".

Stool pigeon noun - A person who provides information about another's wrongdoing.

Smoke screen and stool pigeon are semantically related. Sometimes you can use "Smoke screen" instead a noun phrase "Stool pigeon".