Department of defense and Executive department

Department of defense noun - The federal department responsible for safeguarding national security of the United States; created in 1947.

Executive department and department of defense are semantically related. In some cases you can use "Executive department" instead a noun phrase "Department of defense".

Executive department noun - A federal department in the executive branch of the government of the United States.

Department of defense and executive department are semantically related. Sometimes you can replace phrase "Department of defense" with "Executive department", this phrases are similar.