Green paper and Written report

Green paper noun - A preliminary report of government proposals that is published in order to stimulate discussion.

Written report and green paper are semantically related. In some cases you can use "Written report" instead a noun phrase "Green paper".

Written report noun - A written document describing the findings of some individual or group.

Green paper and written report are semantically related. Sometimes you can replace phrase "Green paper" with "Written report", this phrases are similar.