Blue wall of silence and Cover-up

Blue wall of silence noun - The secrecy of police officers who lie or look the other way to protect other police officers.

Cover-up and blue wall of silence are semantically related. In some cases you can use "Cover-up" instead a noun phrase "Blue wall of silence".

Cover-up noun - Something that covers or conceals like a piece of cloth.

Blue wall of silence and cover-up are semantically related. Sometimes you can replace phrase "Blue wall of silence" with "Cover-up", this phrases are similar.